I use those handicap buttons all the time (with my elbow) as a minor guard against the hygienic practices of the general populace. Best to avoid grabbing door handles that 1,000's of other slobs have too, when possible...
Me too! Or I'll use my hip or forearm to push a door open. And I use my knuckle instead of my fingertip on any public touchpads (bank, debit terminal, copier/scanner at work, elevators). I also steer my shopping cart with my palms, rather than wrap my fingers around the handle. And when I get home from a public outing, I always wash my hands before I touch my face or my eyes.
Am I weird? Mind you, I haven't had a cold or flu in quite some time, so... perhaps it's a valid practice.