@nyanide @meso The most notable one was cum.salon which used to be on Porkbun and got seized by them (doxing).
getgle.org also had some problems with them. They called the mascot CP or something I think. Quite ironic considering their track record with actual CP/loli.
A nameless company which I worked for had few problems with their support after some trolls decided it would be funny to send abuse emails to them.

Other than that, they are usually fine, but their TOS irks me the wrong way. The hate speech clause was very broad when I last checked it months ago (they might have changed it) and since they are sometimes very trigger happy with it, I don't like it.

ryona.agency almost didn't get renewed because Visa/MasterCard cards from the Russia aren't obviously allowed and their crypto options suck, but that's a different thing.