#4 Naomi
Unlike some of the others on this list, Naomi hasn't done anything unsavory or even immoral. Her main fault seems to have been a moment of poor judgement.
Comedian Kevin Hart was backstage at Raw one evening, and many of the WWE superstars were of course eager to meet and greet this august personage. Many of the talents posed for pictures with the comedian, and many also posted those same pictures to the internet. Naomi did so as well, which in and of itself was not a big deal.
However, in the background of her initial post, Kane and John Cena can clearly be seen having a discussion in the background. This broke kayfabe, since Cena and Kane were feuding at the time. The WWE was somewhat miffed about the kayfabe breaking photo, and forced Naomi to take it down and repost it with Kane and Cena edited out.
It just goes to show that even the nicest, most well intentioned celebrities can run afoul of controversy.