On the "you gotta draw the line somewhere" principle, I have not yet gone so far as actually to send out a Tweet. But about a year ago I reserved my own name on Twitter. Here is a concise reminder of why that can be a prudent step:
Yes, yes, I realize that this is disrespectful, profane, NSFW, possibly injurious to the judiciary, and so on. But it is pretty funny. Someone already has "Alito."