Foe me, its ok to disagree on a topic, but please be polite. As I stated, if more people treated others with respect then this discussion wouldn't be happening.
Disagreeing is ok, but why degrade a member or his idea or his post in the name of freedom of expression. To often people feel empowered because they're sitting behind a keyboard and not discussing the topic face to face.
I agree that anonymity is a major contributing factor to unpleasant behavior. If I remember correctly, there are sites now addressing this by insisting that posters use their real names on their posts. I am not suggesting that this is necessarily the appropriate solution the the problem, and am certainly not suggesting that MR adopt that policy...but it is an acknowledgment that anonymity is a contributing factor to incivility, and an attempt (perhaps misguided, but an attempt, nonetheless) to address this problem
It is an issue, for me, of ambience, of the atmosphere created during discussion. It's not disagreement or spirited discussion that I would like to see discouraged, but the unpleasant atmosphere created by contemptuous and disrespectful exchanges. There are some wonderful threads where everyone who posts are polite, respectful, and civil to one another, and that in no way detracts from enjoyable, often humorous, and spirited discussion.