I have to agree with you. The beauty of anonymity is that people speak their minds, unrestrained from social impetus. Although anonymity is a double edged sword, I believe that the blunt, raw truth is much more valuable than a veiled, politically correct, socially acceptable response. This is one of the reasons why 4chan is such a popular place, everyone speaks their mind without having to worry about karma/internet points or how their opinions will impact their real lives from doxxing and such.

I maintain two identities on most social sites/chatrooms/hn; one that uses my online alias, and one that uses an abbreviation of my name (bsamuels). Whenever I feel like voicing an uncomfortable or controversial opinion, I use the online alias.