"Déjame tranquilo/a" (pronounced "DAY-ha-may TRON-kee-lo/a," more or less) worked for me in the past. I've also said the same ("leave me alone") forcefully in English when someone was really being a pest. It's more the tone, I think, than the words. And a stare seems to work, too. It all goes back to what many people have said in earlier threads about being aware of your surroundings, not looking lost or hesitant, etc. The same advice goes for all cities/crowded areas around the world, I think.
But don't let worries about the odd creepy person get the better of you! Have fun!
Hey, Chica369, I just noticed another post of yours, entirely in Spanish, on a different thread...so you clearly don't need the pronunciation advice above! But I will leave it there in case someone else wants to give it a try....
Tara
[ 12-12-2001: Message edited by: MadridMan ]