Slashdot, the venerable ancient for tech discussions, allowed temp accounts under the term anonymous_cowards.

Their camouflage was tactics, not cowardice. Don't bring the courage of courageous men as a shield for someone lacking convictions.

For what its worth, I sympathize. I live in a country where I recognize that I am not as free as America used to be. That means I recognize the courage of those who take actual risks, and I also understand the weight of my words and the risks they may carry. I don't shoot from the hip.