This is kind of the point of social acceptability, or lack of, mainly because ANYONE you see on the subway, on the bus to work, or cute little blonde in a car next to you in gridlock, anyone can do anything like this, you can never tell just by looking at them in normal life.
We've been to the Melbourne Cup Carnival, and to get into the posh area, you need to pay conserable $$$ or be invited into a corporate marquis. Late in the day all sense and sensibility goes out the window, and it's hard not to notice some leggy upper class girl casually going when she stands. A lot of this doesn't make