Why can't he do that?
Because it's weird. Nobody else signs their posts.
There's nothing wrong with it.
Yes there is. You don't need to sign your posts, your name is right next to your post. It's not like your sending a letter.
Signing your posts just makes you look like you think your that important...
Stop telling people what they can and cannot do.
"People"? I think you mean just you. I'm telling you to not do this because it's dumb and nobody likes it when people do it. just don't do it.
idk. I think its petty to make a user post a certain way. Remember the "thinker" drama. That was so stupid