Why do you expect it to make any sense?
If you have to invent things to criticize, you might find it better to take the time to know what you are talking about rather than to throw out silly claims.
Perhaps posting things in the wrong place or on the wrong topic is simply rude behavior on its own and has nothing to do with whether there is some bias regarding belief or the lack of it.
It’s a little irritating you jumped to conclusions about this. We treat this guy’s posts the same way we treat posts by any other spammer: we remove them and ban the account. He just does it more often. We do not censor posts because they are negative to atheism or to religion. In fact, "Mabus"s’ first posts were not about religion. They were about Nostradamus and James Randi’s famous challenge. The atheism thing is more recent. Spamming is against the rules here and he’s spammed us under maybe 30 different names, including a bunch in the last couple of weeks. That’s why he gets banned and his posts are removed.
Like I said in another thread, Silverstreak Wonder, you would have a better idea of how things work here if you read a few more threads without participating and paid some more attention. The mods don’t have a vested interest in protecting atheism or any other viewpoint. If you took a look at the forum descriptions and got familiar with the way the SDMB works you wouldn’t have to make assumptions about why the mods have responded to some of your posts.