Well, at 50, I have not grounded my offspring in quite some time!
Ok, you asked a legitimate question, and it deserves a serious and responsible reply.
"grounding" gave way to withholding high school social functions.....be it a ball game or a dance
Then to driving privlages
By the time, my girls ( each one of them graduated before the age of 17), were through with High school, I had little to 'hold over " their heads.
All that I had left was education and communication...these proved to be the most powerful tools in my parenting aresenal. Loking back, I wish I had embraced it much earlier.....even though, I considered myself, even then, to be open minded and aware.
My very, very best advise to young parents...................listen to your children, they will reveal their needs to you. You just have to learn how to apply the applications.