There is no separate ban message for any kind of violations as far as I know but in the past there was some talk about adding a reason column under the ban message which can be like plagiarism, excessive spamming, ban evasion, etc.
Instead of giving different messages for different violations just adding the reason for ban is very simple and more easy to add.
Why not? It seems like I'm writing this a lot lately: Theymos just isn't adding new features/improvements to the forum lately. As far as members asking why they got banned, I think that's a load of crap. 99% of the time they really know why, but they play the babe-in-the-woods card in their ban appeal threads more often than not. If they didn't start off those threads pretending to wonder why in the world they got that ban message, the rest of their post wouldn't contain much of an argument for their reinstatement.
So yeah, it'd be ideal if there were different messages for each ban reason, but realistically I don't think that's going to happen.
And what Findingnemo was what caused my confusion. I though there WERE different messages for other things.
So In my mind, adding 1 more line item would not be a major programming change. If there only is one, the back end work would probably be more.
On the note of 99% of the time they know, yes probably they do.
But telling someone that they were banned for spam / plagiarism when they were banned for ban avoidance (or something else) gives the other 1% some reason to come back.
-Dave