Maybe they just banned you because of your name.
But really, if you're not posting something productive on a thread then don't post. Things like "Lol that's funny" or "Wow that's cool" are probably going to be marked as spam. Or if you don't read a thread and post an offer or ask to buy something that's already clearly been sold if you read the thread. Maybe try to make being on the computer a good thing by posting constructive posts instead of sitting their posting half-brained comments. It's not that you're stupid it's just people are so use to doing it that it's become a thing. In some cases it's completely fine but I've started seeing it all around the internet, meaningless and pointless posts made on threads, and some of them don't even have anything to do with the thread. Either you're trying to get a higher forum status or you're just not using your brain.