It's not so bad yet in Europe, but I hear that in the States there are all sorts of guidelines that university academics are advised to follow, just to avoid any problem. These include not closing your door when you are speaking to a student, even if the student wants the privacy, not shaking hands with the student unless the student offers his/her hand first, and not sitting between the student and the door.
And these are university students, so at least 18-19 years old.
Nobody living can ever stop me
As I go walking my freedom highway.
Nobody living can make me turn back:
This land was made for you and me. (Woody Guthrie)