If a man has any sense at all he will be honest in his profile. I imagine there are men that will lie to try and impess women, just as there are women that will lie in an attempt to impress men. Sadly dating sites attract lots of liars, scammers, fakes you name it.
Lots of us are honest. The problem is that if say 5 women tell the truth, and 5 put up pictures of themselves that are 10 years old (and 50 lbs ago), the guys write the liars. Similarly, if 5 guys tell the truth and the other 5 lie about their height and wealth, guess which ones get the first date?
My advice to people that are only meeting liars is that their standards are too high for things that do not matter, and too low for things that do matter.