I think correct forum etiquette is to simply put the person on ignore, and go on your way. Bragging about what you are doing, is an immature and non-Christian way to get a last stab in at the person before you hopefully stop engaging with them.
Finally, about the person who got banned: every forum I have ever been in has rules about people returning who have been banned. And that is to ban them again, based on IP address. I know one woman who paid a huge amount for a revolving IP, so each time she posted, the address was different. Thus they could not ban her based on IP address.
The kicker for that woman? She continued to display the same rude and nasty behaviour she did when she first got banned. You didn’t need an IP address to figure out she was back! (Not CC!)
The person who was banned this time, on the basis of what he did last time. I don’t know what he did last time. He could have been sending nasty pms to someone. He could have been threatening someone sexually. He could have been relentless in harassing someone, which we would never know. Or he could have just been a continuing menace in the forum.
Suffice it to say, I know the mods had good reasons for banning him in the first place. Plus, unless it is really something bad, you do get warnings if you do something wrong, unless of course, you are already banned and came back and tried to fly under the radar. Really, you would think if you did something to get banned, you would cease from that behaviour if you returned. And yet, several members recognized his writing style.
I guess a leopard can’t change his spots, although Christ can certainly change us, if we let him!