it happens on other games too, we are a small community so things are more noticeable
That's exactly what's wrong. We're a small community. Abusive users, cheaters, trolls and whatnot tend to go for more famous games (hence the lack of blhack2.dll), yet apparently a lot of people would rather pay ten dollars to come here rather than, say, free-to-play games like TF2 and just download one of the hundreds of hacks.
So,
how is it we're a troll magnet? Is there an organization working undercover to destroy any remaining life in Blockland? All those years with such skilled (and not) problem users, that could be the case.