Attack the ideas and not the person, the sleeping in the office and bathing thing has been beaten to death many times over and has very little to do with the open source ideas that Stallman has been relentlessly promoting. Effectively he's given up a normal life in order to do this promotion. You could for the same money laugh hard at the military, monks and anybody else that has given up the comforts of regular life in order to commit to a life of service (whether or not I agree with any of those is besides the point, it's just that once you decide your vocation matters more than you do that luxuries cease to matter).
Stallmans ideas are very much worth all our attention and his service has brought us as an industry enormous benefits.