dont ask if it could get worse, because believe me it can. i said the same thing, then my 78 truck blew the power valve in the carb (think raw fuel out the tail pipe at low rpms) and my clutch slave cylinder both went in the same week. If you can find out who did it, try taking them to court for destruction of private property. If that doesnt work, try taking the school or school system to court for not providing a safe school enviroment. Think about it, if they can slash a tire, they can slash a throat. (OK its a gross overstatement, but when used at the right time, people pay up when those kinds of statements are used) And finally, if both of those dont work, pin holes in the tire valve stems, dead fish in the hub cap/wheel cover, dead fish under the hood, vasaline under the door handles, motor oil or clorox on the drive tires, all are wonderful ways to get back at people. Not that im saying you should, just saying that you could.