Not all anonymity is born equal.
For the longest time I left my blog open to anonymous comments because I found many of them were from what appeared to be educators who wanted to speak up in an effort to challenge the status quo in favor of progressive education but fearful of reprimand.
Unfortunately, due to multiple unfortunate circumstances and grossly inappropriate comments from unhealthy individuals (cowards) who chose to use anonymity as a cloak of immunity, I can no longer afford to allow anonymous comments.
I've also found my small share of trolls on Twitter. I don't use the block function often because I'm all for disagreement and cognitive dissonance, but when name calling and personal attacks become the standard, you no longer get to clutter my inbox and timeline.
Anonymity can be used to be courageous in the face of oppressive rule but it can also be used to be an asshole.