A lot of cracking- and RE-related websites sit now behind CF and, no, they are not taking them down, because apparently flaunting one's cracks (while linking to them on other sites) is not an abuse of their terms.

Unless your site involves something particularly terrible, their abuse form is only good for the fact that it gets forwarded to the underlying web host.

Most web hosts are going to be more strict than CloudFlare is, but you'll notice that most scummy sites use scummy hosts.