Just COMPLETELY ignore it. I truly believe after spending so much time on Reddit I became a worse person by being exposed to the same regurgitated/top voted opinions on things nobody should be talking about unless qualified (which you can't verify). I realized after a few years after taking an objective look at my life how much I had changed. If you dwell in a medium, you tend to absorb it, and that's the only medium…
Oh come on, really?
I'm a hobbyist game developer. I frequent a few subreddits including /r/gamedev. It's a fantastic community and I've learned a lot there, and I've been able to use it for free promotion. It's been very valuable to me and I've enjoyed using it.
If your statement was "you don't stand to gain anything from /r/funny ever" I might agree with you, but this is just too broad a brush to paint hundreds or thousands of individual communities with.