I attended BYU for four years and worked at the school paper. Students there are just too sensitive for their own good. When I was at BYU, an ad in the school paper for a one piece swimming suit caused some to write to the paper to complain about the immodesty of the ad. I live in Nevada too, and agree with the shirt's designer...I use that phrase all the time, not because I want to drink, etc., but because it is a simple way to explain why I won't drink, etc. Everyone understands. Perhaps the offended students at BYU should spend their energies on some real problems. Some BYU students need a little Prozac.
If you want a really over-the-top example of being oversensivite, I have a story for you.
When I was at the University of Waterloo (early 90s) there was a HUGE blow up over a poster used to promote some sports related awards show/dinner/whatever. The poster showed two basketball players, a guy and a girl. The guy was standing up with a ball under his arm at his side, the girl was in front of him and to the side a bit, she was crouched down (like at the bottom of a deep knee bend) and a ball was on the floor in front of her. Both of them faced the camera, but the SHADOW of the girl's head fell on the crotch of the guy spaking a feminatzi crusade over it's supposed oral-sex/female servitude message. The University retreated and withdrew the poster if I recall correctly.