In some cases they are. Snort I believe is deployed operated by the developer for example.

It's not hard to find but node operators do try to keep the worst stuff harder to access and there's plenty of cooperation with authorities.

It would be hilarious. I actually think it's a good thing when people who help distribute child sexual assault material are charged. Even better if they get full custodial sentences. So if you operate a relay that doesn't remove that or you run a website where relays that provide that content can be used, then you should be jailed. Preferably with a massive angry guy on a triple life sentence.