One weekend when my wife was out I actually invited in a couple of Jehova's Witnesses and asked them if they knew anything about Satanism! (very true! they didn't stay long!)
I have stopped doing some things not because someone told me they were not "PC", but maybe because the PC movement (or, as I like to call it, "The Pussification of America") made me realize how insensitive I am. For example, I no longer toss my cigarette butts out of my truck window.
I no longer openly hunt spotted owls.
I have even stopped distributing my "Endangered Species" cookbook on Amazon.com
I no longer force my neighborhood children to fam-fire my 9mm before they can visit my daughter.
I no longer insist that visitors to my home wear "Hello I'm_______" badges declaring their religion. (i.e. "Hello, I'm Jewish", "Hello, I'm Baptist", etc.)
I haven't clubbed a seal in... gosh... weeks.
I have stopped swatting our secretary's ass when she walks by, and I haven't called her "tootse" in a long time.
What is the worst thing you have done only because someone told you not to do it?