Define The Banner Hammer Meaning

Used on a website, by an admin to ban spammers or such people that don't belong in that site. Also in online games, when you're a complete noob and others can't play because you're on the way.

More commonly referred to as the "Ban Hammer" or "BANHAMMER"

Something people on an online forum or game in which people referred to as
noobs run amuck, say to or at such noobs in order to insinuate that they dont deserve to be there and need to be 'banned'(see the wordplay?)