Just ignore the BS and try to keep your temper under control when you
see something particularly egregious. The only way to kill the
off-topic stuff is to ignore it.

Trust me on that - I got sucked into a couple even thought I knew
better. It's hard not to do.
I agree 100%. Usually don't even read it but sometimes something will
catch my eye and occasionally I can't help myself. If everyone would
ignore the few they would probably get tired of talking to themselves.