I agree with Atom Smasher's take on this. Be proud of who your are. Lying about your age to please a girl is just supplicating to her. If you have solid inner game, why would you have to misreprent yourself? That's giving her the frame. She's lucky to get a chance with you, she should be trying to impress you, not the other way around. You're the prize.
Also, I can't be bothered to lie about my age, because then I'll have to remember how old I'm supposed to be. I've never been rejected because of my age before, so why should I care?
That said, I know some guys are compulsive liars, and they will lie to women all the time. It's not my style, but I have seen guys work that sort of thing successfully.
But if I, at 52, would not be afraid to tell a young girl my age, why should a 28 year old? It really is laughable.