Absolutely. I was once summarily kicked from their then IRC chat (it moved to an in-house proprietary server, then moved back to Blitzed sometime later) and banned from the site, without explanation. Upon querying this, a moderator then abruptly unbanned me and stated that he had banned me because he found some "nasty stuff" about me on the internet (though he would not specify what this "stuff" was), but had since realised that it didn't relate to me at all, but someone with a similar name. No apology whatsoever was ever issued though.
I am still banned from Adisc, for another quite pathetic and ironically, childish reason - apparently I'm "too sarcastic" - they don't like contradictory opinions on that site, they don't like people causing "drama" (even if such "drama" is just to disagree, even with justification and citing sources) in forum threads if it's against the popular opinion however so that may be prevailing at the time, and they do nothing noticeable about bullying or discrimination such as homophobia and vile threats received in message content or their IRC channel.
Absolutely.
Adisc was founded as TBDL, indeed I knew the two persons originally responsible for this, and back when it was TBDL the atmosphere seemed far more congenial and reasonable. Now, the administration of that site is probably a case study in human psychology in itself! And there are somewhat darker elements to their decisions, processes and rationale - the suspicion of people who fail their much lauded "background checks" - in reality, searches of public Facebook profiles, via google etc (as they have no actual power or authority to enact actual background checks such as a CRB) - because they have reasonably chosen, not to show their entire life to the world via Facebook. I like many people consider it reasonable to use privacy controls, otherwise you may as well just stand in a city centre and shout about your life loudly to anyone who passes by.
They also believe that they have some kind of jurisdiction over individuals private lives beyond their website; I know of two former members, both of which were banned for "sharing a hotel room" as one was 16, but under eighteen. This "incident" happened in the UK, the age of consent here has been sixteen for all orientations for over 14 years and so even if sexual matters occured, if they were consensual there's no issue here. Further, as far as I'm aware, they did just share a hotel room and nothing more.
They are worse than the government, any government.
If you read into their terms of service, they state that if you sue or issue proceedings against them, they will basically publish anything and everything they know about you on the internet in a publically acessible location. This is illegal and probably blackmail (a criminal offence in itself) here, and breaks British and EU Data Protection laws, and probably those of several other countries too. Adisc seem to have no regard for the law or common decency when it contradicts their own sense of superiority, however.