Need I give a reason?
It's pretty simple, actually. He was banned for trolling. I read over many of his posts, and nowhere could I discern a traditional Catholic position. This is a traditional Catholic board. So any fervent Novus Ordo Catholic HOSTILE to tradition, as aquinasG was, would only join a board like CathInfo to "troll".
Novus Ordo Catholics are welcome to come here and ask questions, etc. and they will be presumed to be of good will. That is, until we see otherwise, as was the case with AquinasG.
The definition of "troll" is someone who joins a board just to get a rise out of all or most of the membership, by taking views calculated to inflame passions.
For example, if I joined a Democratic message board claiming to be a staunch Republican, or a Jєωιѕн forum claiming to be a neo-nαzι. Basically, trolling is a behavior frequently seen in teenagers -- those who are bored, who like to mess with people and get reactions from them. Those who don't have a life.