Ahh...I'm glad you said that. Problem is they are still using their hands and not an elbow or knee or what have you....which means either
A. They are idiots as touching a button that everyone else also touches with your hands is just as "unhygienic" as touching the door itself....not to mention there are hand sanitizer dispensers immediately inside the door way.
B. They are just lazy self righteous fuckheads.
When I used to work an office job I had a similar problem. I had all these young 2o somethings that would spend all day watching things like who used the automatic door and who didn't rather than doing their fucking jobs.