Pitbull, it's one of those things where I have no realistic way of stopping people who would want to do such a thing, so I didn't set any rules against it. It's the same reason banned players are allowed to buy new accounts to play again, because it is just too hard to stop people from pretending to be someone new, if they are dedicated to doing that. At least if there are no rules against these things, everyone has the same options. If I had rules against any of these things then the good hearted people would obey the rules, while others would just get around them and have an unfair advantage.
I've jotted down the suggestions.