You're not asking them to look at anything that you've identified as illegal material. If you already knew it was illegal, you'd have deleted it or reported it yourself.

You're asking them to moderate unknown material from new users you know nothing about. That's something that every volunteer moderator from Reddit does.

There were paid staffers doing that at MySpace back in the day. I talked to their head of security; not a fun job.

thats pretty much exactly how it works though