I think that's just something for the hygiene-conscious. I do it, and I don't necessarily consider myself OCD...just a slight germophobe, lol. When it comes to public restrooms, more often than not...I'll avoid them entirely until I get home. xD
When I can't, however...I open the door with my sleeve (most of the doors around here have the handle on the outside coming in), hover (women), flush with my foot if there's a handle, use tissue paper to slide the lock on the stall door, then pull the paper towels down at the sink before I wash my hands (if there's no air thingy), and use my elbow to exit.
Whew, that's a mouthful when I actually LOOK at it..but people are nasty. I still to this day cannot believe the audacity of the people who walk straight out of a stall after using it, and go past the group of people at the sinks watching them do this, and go straight out the door without touching soap nor water. It's gross..and don't get me started on the no-flushing women with no toilet paper in the bowl!!!
EEEWWW