Wrong, I've been gaming since I was 5. I'm 31 now, so because I reach a certain age I have to quit something I enjoy?.. I'll say again.... wrong.
Aye, It's like playing with Lego, or any other hobby, to be frank. If you really like it
and it's legal, there's nothing saying you have to drop it. Sure, some people might look at you funny, but if it's making you happy and it's not directly interfering with anything else, there's no reason to stop it.