(META) The reposts in this sub are out of control. What can be done to control it?

I'm not talking about the occasional thing that gets reposted from several months ago, there are videos that are reposted on an almost daily basis and it gets really old.

Seriously, people, at least take a look at the first couple pages of justiceporn before submitting, and if it's a video that has been circulating the net for years with millions of views, just assume it's a repost and find something else.

I suggest a policy, in bold at the top of the sidebar, that users posting obvious reposts will be banned.