I always tell people I "organized" the hackerdojo classes. I really don't want the attention that comes with the classes.
I do it because I find the people who teach the classes are amazing people who become my friends, and I find the quality of my life improves when I have better people around me. This is different from having just smart people around you. Smart people can be crooks also as in my last roommate. Smart people can develop bad habits and even though they are smart they are untrustworthy.