You can't vouch submissions, only comments, which means anyone with a handful of accounts has a mega delete button that can't be reversed. The only way to stop this is for so many people to flag so many things that the mods turn off the ability for flags to delete things.
No matter how civilised the discourse, for some it's too much. Is there a way to take away the veto of any 10 people who don't like what they see?
Ah, this comment was apparently too much too. All, very quickly as well. The threshold for taking down a post should be higher.
Seriously, do the people doing this think they're doing Israel any favours? Everyone knows about the Hasbara farms by now.