My ignore list runs the gamut from posters apparently incapable of anything but zero punctuation text walls to clever "greased pig" debaters. The latter are characterized by twisting and turning their statements so that you can never get a good grip on them or pin them down to anything.
Generally I really try to engage these people before adding them to my ignore list but lately my patience seems to be flagging. For awhile I even tried to simply skip over their comments but found myself reading them anyway and suffering the inevitable loss of brain cells. Occasionally I'll read one of their comments when quoted by another member and every time it seems my decision to ignore is vindicated.
Still, it kinda bothers me that my ignore list is longer than my friends list. If you have any sympathy for me perhaps you could request to be my friend?
What does it take to make your ignore list?