Add minimal spam reporting system
We've seen four forms of spam recently:
- pages shared with groups unsolicitedly
- direct messages to users.
- spam in comments to public pages
- public pages created to place links on them
There also was a big spam wave a while ago where user accounts were created just to add a link in their profile.
We should have a simple direct way to report these so we can clean them up quickly.
Edited by azul