One Word.. Milk.. and LOT's of MiLK!!!!!!!!! really.. it works..
but seriously, i don't think being tall really matter.. i mean, let them laugh, maybe they just don't really know you yet.. there's more to life then being tall.. i mean, if your good in music or something.. they'll think twice of laughing at you..
be HAPPY with yourself! just say: "i don't care what they think, cause they're not me!" hehe.. did i say it right? oh well..
just be happy don't worry!