Hi Celine,
I have actually seen you in one of the welcome areas and I will say this, the two clowns that were harrassing you are just that....clowns. One pretends to be a psycho analyst and is probably your age or younger based on observing his behavior.
I mean how many adults actually act that way? Anyway, some of the other commentators have hit on the topic, why feel obligated to post your age at all as it does paint a target. It is pretty easy to just NOT respond to an IM or simply block people.
You mentioned people will know your age on voice...I would say not really..I know many women who have "little girl" voices and I know for a fact that they are well over 18 in fact some are over 38 and still sound like teens...lol. It is no indicator, as I am a smoker, I have been called "sir" so it is the least of my worries. You just should toughen up a little bit, don't sweat the small stuff. Only you are in control of your emotions, don't let somone else spoil your fun. Simply ignore them and carry on with life.