I think the trouble is with a thread like this is we all have different "frames of reference" on exactly how extreme we are talking. I have had pretty girls as girlfriends and find however sensible they dress some men will still dribble when they walk past. And to be honest, it matters not that I am a secure person, I think mens actions are sometimes rude just like I would take offense at someone aggresively chatting up a girl who is clearly attached and with her partner, as it shows no respect for the husband (and likely to cause a fight).
I guess the bottom line is about who you choose to date. If the level we are talking is someone who dresses "slutty", can you really expect to enter a long term relationship and them change for you? Personally, I think it would be better to find someone you are happy with to begin with.