"I thought my son was doing drugs on weekends with his brat friends, but I didn't want to involve the school, doctor, or anyone else. I bought the drug and alcohol tests, and sure enough, he was positive on several things, and taking pills stolen from a friends' grandma!
I told him he wasn't driving my car high, and I wasn't paying a phone bill for a little druggie.
It worked. No more problem. He tells his friends that he can't chance it and lose his phone.
I appreciate being able to solve this without nosy people in our family business."