I don't like it for the same reason that a few others have mentioned. If you are in an age bracket that is less common, then you can't ask sensitive questions anonymously without people figuring out who you are.
I like it. I've heard some grumbling about anonymous posting though, for those with ages that are mostly unique to GAG. I hate the anonymous stuff because it makes trolling too easy to do, but you don't want to punish those people who are on the up and up. A lot of people probably feel more comfortable posting anonymously for some subjects, and that's cool. Conversely, it'd bug me out when something creepy got posted by an "over 35", and I'd be like "fuck, that makes ME look suspect", haha. I'm an open book here, I can't remember the last time I went anonymous, but I get why some would want it. Maybe for anonymous posts they can employ the old age range system, and make it specific in non-anonymous posts? I'm still suspect when the creeps come out, haha, but I can just post a quick "wasn't me", hahaha.
Yeah i like it... Im confident of My age why? because i believed being around 30's is my prime age. So im at the middle of my tenures and endeavors. Hell yeah. Im 29 years old single, where my words and my deeds are the basis of my life and death.