Deviantart's failed logic

So Deviantart suspends or bans those who accidentally use copyrighted material (not franchises), such as using someone else's art in a fair, recreated way that fits into fair use, but they let paedophiles and perverts post dick pics, and post pictures of children's feet so they can fap to them? Because that's art? Yeah, ok, DA. Ok...

And yeah, this shit happens. I've seen dozens of profiles, especially foot fetish ones, that sexualise children's bodies, but they don't get banned. Every time I report them, it never works. It actually makes me so fucking angry. It's also the fact that they sometimes target roleplayers who did nothing wrong, but leave the sick fucks that inhabit this site alone. What the actual fuck?