A lot of public restrooms have kick-plates in the doors. I admit, I'm more likely to use my foot to shove open the door, if only because of the GIGANTIC STUPID NUMBER OF PEOPLE I SEE who don't wash their hands.

Yes, elevator buttons and such are just as bad, but they're somewhat less likely to have used by someone who five seconds previous, with nary a spot of soap between, was manipulating their diseased genitals.