Raising teenagers right now, I have had much more trouble with the parents of my kids friends, than their friends.
Many households allow their kids to drink, smoke dope, have sex and God knows what else, and yes the parents are there. One set of parents gave my 17 year old money to buy Maui Wowie for them when we went on a family vacation to Hawaii!!!!
I don't envy you, but we got through it being tough loving parents and it shows in our children and some wonderful grandchildren. Hang in there!