For earning a warning via PM following a suspension, poster Barack Obama is banned from the Straight Dope Message Board.
Suspension:
https://boards.straightdope.com/sdmb/showthread.php?t=881750
Warnings:
PM not linked to
https://boards.straightdope.com/sdmb/showpost.php?p=21848757&postcount=394
https://boards.straightdope.com/sdmb/showpost.php?p=21815780&postcount=51
https://boards.straightdope.com/sdmb/showpost.php?p=21788172&postcount=142
https://boards.straightdope.com/sdmb/showpost.php?p=21625360&postcount=12