I'm one of them, I've always been constructive and respectful but somehow got banned in a cowardly fashion (without notice) in a way where I wouldn't even know I was banned.
Since the ban I have dumped 100% of what I had left with them and won't be going back.
Time may prove that I made a bad decision but I won't regret it in any way, I can't stand behind such behavior.
EDIT: It wasn't a down vote ban, I got confirmation that I got admin squashed, look up the list of admins on HT, you'll notice that there's only 2 or three of them that are active.. and only 1 of them that doesn't have to answer to anyone or doesn't have to document anything.