Wash hands, dry hands with paper towel, open door with paper towel
I wasn't trying to bash Arrington, btw. He has a point about germs. Especially with the sheeple freaking out about Fludor the Burninator and such. But a handshake ultimately is about showing trust (whether rooted in showing lack of a weapon or not), and here he is saying outright that he does not trust anyone else to keep their hands clean to his obviously-high personal standard. I repsect that he's willing to be forthright about it, though I think carrying a travel-sized bottle of Purell might be a solution with milder social consequences in certain business settings.
Incidentally, the door handle in a public bathroom can have significantly more bacteria on them than the toilet seat. So ladies (and gentlemen I guess) when you hover over the seat, reconsider if you actually want to touch that door handle. IIRC one study found a 20:1 ratio between doorhandle and toilet seat (door handles are wiped down with a regular cleaner, whilst toilets get a professional-grade bleaching).