You'd be surprised how MANY people do not wash their hands after going to the bathroom. It's just plain scary.
There are days when I'm at work, and the only paper towels in the trashcan in the guy's bathroom are the ones I'VE used. And I work w/ a few other guys. This either means:
1. they NEVER go to the bathroom
2. they wash their hands, but don't dry them
3. they wash and dry their hands, but throw the paper towel away somewhere else
4. they just don't wash their hands at all
Hmm... I wonder which one it might be?
Also, when I'm at a conference, or at the mall, or wherever, there will be guys who come out of the stalls, or walk away from the urinal, and just walk right out of the bathroom! Dude!!! You just handled your manhood. For God's sake wash your hands!!!
What's freaky is that some of these guys will come out of the stall, walk over to the sink, run their hands through their hair to fix it, and THEN leave. OMFG!!!