What would you do if...?

K so I was at a lake and there were about 12 guys in the grade above me who go to my school. My friend and I walked past the door way that they were all by. Al of the sudden the guys start clapping and yelling whoo! at us. They are asses and half of them were suspended for sexual harassment. I can't go to the principal because it was outside of school so what would you do? And no I don't take this event as a compliment I think they are pigs.