As of late I have been hearing about this alot for some reason and it's annoyed me to the point where I am going to ask if it happens or not. When some people die do they really soil themselves lol? It seems plausible seeing as how the bowels would relax.....Any professional opinions?

It would depend on the gravity and pressure of the situation. Obviously if the bowels are empty, it doesn't matter, and if you are dead, then it does really matter much anyway, does it? Have you never seen an animal get killed? Sometimes shit happens. Sometimes it don't.

Well it happened on South Park so it's gotta be true:D

Yes it would sometimes happen. and as prime evil said, it depends on how much you have in your bowels.