I've cut my own hair in a manner similar to this a few times. I'm detail-oriented, and I was told by several sighted friends and family members that I did a pretty good job. The first time I did it, I told my dad, and he said he'd get my stepmom to clean it up when he saw me next. She took a look, got right up close, probably stared at me for a few seconds, and said, "It's not perfect, but it's pretty good". She then got a pair of scissors, did about fifteen seconds of touch-up, and it was done. Frankly, I'd noticed it myself, but wasn't sure how much it showed or how much I cared. And the second time, she didn't even say that much; she just took a look and said it looked fine. I mean, it was just a plain cut, nothing fancy whatsoever, but at that point I didn't care.

A black, flimsy plastic rectangular deep pan that you use for washing dishes. You can get them at the dollar store. If you don't have something you can capture the hair in, just use the floor and sweep it into a dust pan and throw it away.

It's pretty easy. The whole point of there being a guard is that it only lets the hair that's long enough anywhere near the blade. You just go slow. Don't do it with wet hair. If it's pulling, you are either going too fast, or you need to stop and clean out the blade. If you have clippers with a set screw on the side, try making fine adjustments one way, then the other, and see if that helps. Only do this if it's not cutting well, and nothing else works though.

cut it in the bathtub, and collect all the hair into a bag.  That will confine the hair into a relatively small place and make it easy to pick up.

yeah, bathtub is a terrible idea.  If you want to do that you had better make sure the tub is 100% bone dry and that you have a shopvac or something.  Hair down the drain is not something you want to deal with.

@10
Yes, they are.  If you have a big drain or don't do this frequently you might get away with it, but shower drains aren't designed for large volumes of solid matter, and these sorts of clogs build up over time.  Sending a haircut worth of hair down it isn't a good idea, no matter how small it is.  Given that using a vacuum is trivial and using a drain augur is disgusting and definitely not trivial, this isn't a general solution.  You're just getting lucky that it works for you.

Lol, at risk of being captain irrelevant here, I'm rather pleased with the length of my pony tail currently.

I have had one a couple of times before, and only cut it because a director told me it was okay for performing in the pirates of Penzance, but wouldn't do for other productions, then again since performance opportunities are none existent in this crappy country even before the pandemic, that doesn't exactly matter too much.

People say it suits me, then again, I'm careful about taking care of it, since I have rather a lot of hair and it does tend to tangle if I don't use the right sort of conditioner and hair brush.

Just call me Khal Darko .

there is a thing called a p-trap in your drain.  Basically a u-shape where the water goes down and then back up.  You can send whatever you want down the drain for a while, but it will build up in the bottom of the p-trap.  Once that fills up enough, you've got a problem.  Size doesn't matter.  The only drain I'd send solid stuff down is the kitchen sink and that only with the garbage disposal and even then not if there's a better choice available to you.

This is a stupid argument to be having lol. It's not rocket science what happens when hair goes down a drain. Even if you plug it, you'd have to be sure to clean all of it up before you pull the plug. And no, those levers below the faucets aren't enough.

Let go of this one, you gave bad advice. You were wrong, it's not the end of the world, but quit stubbornly sticking to it like it's the only thing you have to keep you above water.

Christ, my uncle is a plumber. I could text him about the advisability of doing this, but it shouldn't be necessary.

Yes you did give bad advice. And have I ever claimed to be a plumber? Thought not. It's good to see your prestigious advanced degree taught you how to argue. I'm glad the healthy debate spirit is still alive in you .

Seriously, get over yourself. You just make yourself look more and more silly for each thread you speak in.

Outside is good. I heard that birds and other creatures will take your hair and use it for their nests.

My general understanding of this is simple.
When you shower, you will sometimes lose strands of hair. You're not losing it in clumps, but you're still losing it. This is true of both the hair on your head and the hair on your body. Normally, you don't even think about it, and it just washes down the drain. Dead skin and lint also do this.
Emptying your P-trap is a good idea from time to time, for sure, especially if you have a lot of hair or are not careful about what goes down your drain. However, it seems to me that individual hairs, or tiny groups of hairs, will be washed down the drain, then up and out of the P-trap, via simple physics. Build-up can happen, but I think those who are representing this problem as dire are...maybe overselling it a bit.
No, you should not just cut your hair in the bathtub and let all the hair go down the drain. That's an excellent way to get a clog, and those fuckers are pernicious. But if you put a plug in the drain and wanted to cut your hair while standing or sitting in the tub, then made sure to get most of the hair out of the tub before pulling the plug, I'm sure you'd be fine.
Fun fact: I have been living in my apartment for seven years. I'll be honest, and tell you I've never actually emptied my P-trap, though I definitely should. My bathtub drains fairly quickly, and I haven't noticed any slowdown during the seven years I've been here. I have cut my hair while in the tub before. Ostensibly, seven years of hair and god knows what else should be clogging my P-trap, but it's not...at least not enough to cause me difficulty right now. Again, I'm not saying you should let whatever stuff you want go down your drain, but I think Ghost actually has more of the right of this, even if I think the argumentative tone isn't helping anyone (and no, that's not just Ghost either).