Yes, I do.  I've had too many anon trolls come and be obnoxious or irrelevant, so now I make all my articles open to response only if the person has a JU ID.  It takes 30 seconds to create one, and I figure that if they're that intent of being heard and leaving a comment they won't mind creating themselves an account. Some of the things the trolls have said have been really pretty nasty - I can handle a few digs and disses here and there, but these people were taking shots at my children and my family. To me, they crossed the line with that.