I have only seen it a few time at the docks and it was some old lady with saggy boobs cover them up please. I saw a couple of topless drag queens at last years pride with nice faux ones and too many lesbians at pride that should have covered up.
It is not the social norm here like it is in europe so men basically drool on less it is someone that is really nasty.
Oh I forgot tons of topless girls at the Stones SARS concert most of them were ok dudes were drooling.