There's apparently been cases of people getting organ transplants, such as lungs, hearts, etc. and suddenly taking on personality traits of the doner, too.
Here's a bunch of anecdotes, which we all know is the ultimate evidence!
We should shun people who give pets up at animal shelters and eat meat, too.
In fact, that time you decided to keep a bug in a jar 'cause it looked cool is all the evidence I need to exile you from our perfect society.
BURN THE HEATHENS
This is probably the only semi-valid contribution I can make to this thread without sounding like a useless echo:
http://www.youtube.com/watch?v=JsWv9nFLl_s
I figured the average peasant-citizen of America would be too intimidated to ask for something like that at a store without getting arrested for something.
Use your Straight Edge friend's pee, otherwise just don't get the job for now. Nothing I really know of that can help (Though it would be awesome to know.)