I am protecting my future job prospects by remaining anonymous. When future employers google my name and hire companies to do it for them, I want them to only find good things.
In most career fields, it's irrelevant, but in academia it's a big deal due to the competitive nature of job openings. I've been on a search committee for a new professor and distinguished, highly qualified candidates were rejected solely because their Facebook page contained drunk pictures and spelling errors.
In the information age, the public face you put out there stays with you forever.
When someone searches for my name, it is my intention that they find nothing negative so nothing can be held against me. And regardless of content, someone will find it offensive.
Tenured professors have been removed from their jobs solely based on what they have said in webforums and on social networking sites.
University managements would rather dismiss their best professor than come under any negative scrutiny.