I for one have never posted a definition from a dictionary verbatim on a forum, mailing list, or any other online medium just to make a point. If I'm honest, it kind of makes you look like an arrogant dickhead. You're basically saying, "see? Look how much more I know than you!" Well, guess what, if that person had done a Google search, they too would have been party to the same knowledge. There are much better ways to make a point than acting superior and obnoxious. If you need to clarify a point that you can't explain well yourself, then, by all means, post a link or two to more information, but that's totally different.
In general, though, I agree with the thrust of what those who are saying to relax, leave it alone, and so on are getting at, and if it hadn't been for that cringeworthy defense of posting actual dictionary entries, I wouldn't have said anything either.
The glass is neither half empty nor half full. It's just holding half the amount it can potentially hold.