From the looks of it, you was probably banned for insubstantial posts. I looked through the last 2 pages of posts that you made and they was not 1 that I seen that was over 2 lines. Most of your posts consists of 5 or 6 words. I would say this is the most obvious reason that you were banned. Bitcointalk is making a crackdown on spam quality posts. In the future try to put a little effort into it.
Errm i dont think so, the message would be : you have been banned for insubstantial posts. The thing is that the message you get when you are banned seems to lack information, thats the huge problem. There are threads like this one every day because the message is just not clear. Even insubstantial + sig is not clear at all, for someone that doesnt know english very well that doesnt explain shit. Something like: banned for insubstantial posts, off topic or useless posts wearing a signature campaign would be a better message