For me, anonymity allows me to voice my opinions without considering the potential consequences those opinions might have for me in certain groups of people. I find that in working with people, the less they know about me personally, and the less I know about them, the more productive our association usually is. It is really nice to be able to discuss ideas with people though, I’ve learned and grown so much through discussions with random people who I’ll never know except through their opinions and musings.