A large problem I see on my other flist - my nonwriting journal - is that people intend to say one thing, but on the internet it's really easy to misinterpret the tone of a comment. Sometimes it's really easy to read a comment as rude when the writer didn't mean it that way.

I really like the comments above as well, and think this is good for all of us to read.

Another helpful thing is to add an author's note that you would like concrit, but are sensitive to it. That will usually help remind people to be more careful how they word things.