Always knock off seven years if thirty plus from the age they tell you, and five if they look in their mid twenties. It's not a scam it's just good advertising. I punted for a few years in my mid-20s, stopped when I got into a relationship and started again when it ended four years later. Apparently some of the girls I used to see have managed to stop time, 'cause their profile ages have stayed the same 8p.
Sometimes we do it to ourselves- one WG told me if she was honest about her age on her profile text but entered it differently on the age section because otherwise she never showed up in searches.