Cardboard has been banned.

Cardboard received three warnings for trolling in the past few days, and five in all since last September. He also started large number of trolling threads that ended up being closed without receiving a warning. Since his communications with staff indicated he had no intention of changing his behavior, he’s been banned.

Warnings are here.

http://boards.straightdope.com/sdmb/showpost.php?p=19164026&postcount=2
http://boards.straightdope.com/sdmb/showpost.php?p=19149153&postcount=215
http://boards.straightdope.com/sdmb/showpost.php?p=19148900&postcount=209
http://boards.straightdope.com/sdmb/showpost.php?p=18746365&postcount=9
http://boards.straightdope.com/sdmb/showpost.php?p=18723152&postcount=27