Replying to Getting Back At People/straight up bitches

so heres the deal, I want to get back at these 2 girls for giving my girlfriend shit for the past 2 years. All they do is call her a slut and a whore everytime we see them. and its usually only when they are in big groups of people or in a car driving by. We Have no idea why they are doing this shit but you know how girls are nowadays, Drama, Drama, drama....The truth is my girlfriend is no where near a slut and these girls yelling this shit at her sleep around with so many guys and its a proven fact that one of them has herpes. These girls need to be taught a lesson. Killing them is out because I dont want to goto jail. So I come to you NSerS to tell me of any pranks that you have heard of and or done. I dont care about getting suspended from school or any of that shit but just dont goto far as to get me in trouble with the law. so far a few of my other friends(BTW I have about 5 kids willing to do this with me 1 with a car) on my side have come up with these ideas,

-Put shaving cream all over their cars then put dogshit into all the door handles
-throw piss water ballons at them(in or out of school)
-take a hug tub(like a garbage can) of water/piss/etc and dump it on them and then pour soemthing on them that will stick like flour or something.
-paintball gun driveby maybe?

I will try to get what we do on video just for you guys.
HELP ME NOT GOTO JAIL NEWSCHOOLERS!please?