i know of no posts that dissapeared, except the one in question from vulcanel which SHOULD have dissappeared. posts were moved from the I forum over here, which was probably the right thing to do. were posts deleted from the I forum? you said "when posts that ask logical questions about things ppl want/need to know start dissapearing", i was unaware that happened - did it? if it did i disagree with that.
as far as having your posts altered and having no explanation of why you were banned or what you did wrong, i totally disagree with that. if someone is banned they have a right to know what they did wrong and how they can remedy the situation.
i have seen posts VERY critical of curezone and Spirit in Debate Forums be left there untouched. in fact you can go in the archives and find plenty like that. so i do think that you can criticize CZ in the Debate Forums .
if someone has a problem with the way a forum is being moderated, that person can post his or her issue in the debate forum, with some respect, and i am sure it will be fine, and their post will not be erased. of course i could be wrong. insults, however, will most likely not spark any change.