If the person is clearly an idiot and has been banned, it should be fairly obvious that they are some sort of troll who should be ignored. Not only is it unecessary for ten people to reply, but you're also doing exactly what trolls want you to do.
Ignore them. Be a bigger person than they are, and don't reply. Next time, you will all receive infractions for replying to SPAM, so please don't let yourselves be tempted into breaking the rules.
~Psychic