I keep my powerlevel 100% suppressed. But I don't even hear people talking about /b/.
I've learned to suppress my power level out of necessity. When I was younger I would sometimes let it slip that I liked anime, and people would start treating me like some alien from Pluto. Now my only real interest I can share with people is that I like too jog. My other interests I make up, like pretending too like hockey. And then when someone mentions the recent game I go "Ohhh damn, I missed it, yea I heard it was good" etc. etc.