Back when my kids were in elementary school, some kid climbed up on top of the toilet and stuffed toilet paper into the lighting. I don't think they ever found out who it was, but someone smelled smoke and the teachers followed it to the bathroom. They were lucky to catch it before it actually caught fire.
But I agree that parents need to hold their kids responsible for their actions, but in our case, the teachers needed to hold kids accountable, too, but never did. My son was bullied so badly we ended up having to change schools for his safety, and when that all happened, even though I was having to come in 3 times a week to report new incidents, they were "shocked" to hear how bad it was. And no one was ever punished, even when kids were caught doing it. No one wants to be the killjoy who won't let the kids have fun. It was always my son's fault for "reacting". "If he would just stop crying, they wouldn't do it." It seems like kids get away with murder these days.