That's okay, I'm an equal opportunist "thank you sir" for those that open or don't open the doors.I think your other two examples are truly class acts and our society woudl get along much better, and faster if more people were like you.
However my friend, saying "You're welcome" in any voice, especially a raised one is classless. For may reasons, not the least of which is that some people have social anxiety and would actually become stressed over what they would perceive as an act of aggression. As for the other people, they would either just feel uncomfortable or that you are a creep.
I don't discriminate. Let these people feel stupid, let them realize that in this country,this is how it's done.
Pussy footing around, being "nice" isn't gonna do anything, get in their face, make them realize what's going on, they'll get it eventually.
Boot Camp for Doors.
If it truly is an act of kindness on your part, then leave it at that. A true act of kindness satisfies the giver, and needs no acknowledgement from others.
I recall one definition of having "class" is one that treats everybody with respect and can make anyone comfortable from the Duke to the 'dustman' (garbageman).
So... as much as I hate the saying..."Keep it Classy"![/QUOTE]