I think the mods do a pretty good job. They let posters away with a fair bit of crap / off topic posts. The adding of the funny button saw the verbal diarrhoea on the site increase 10 fold and normally when there is something genuinely funny the joke just get hammered to death.
I wouldn't blame the funny button. After the last 6 years I think self-deprecating humour is all most of us have left to keep us sane.