What's the punishment for a user who uses their alternate account to self-lurve?

What I’m referring to is someone who uses their alternate account to give a GA or GQ to one of their own posts.

Is the perp given a warning, temporarily banned, or permabanned for the first offense?

I remember one particularly obnoxious troll who did that, but I’m not sure if it was banned afterward, or if it once again just deleted its account.