Consistency is key.

However if you Kids are already in their teens and running riot... then what ?

Consequences may mean little to them, as they will adapt.

Cancelling their phone contracts may seem to be the immediate solution - though when they suddenly appear with their own self-funded phones... then what ?

Locking them out of the house neither.

Shutting them out isn't the answer. Neither is being a yes person to everything they wish.

Parenting isn't an exact Science, though when Governments get involved by telling you what you can and can not do... that, becomes a problem - in such a case, I'd say to the Government, okay - now it's your problem, sort it out!

So without Sex how did various Religions get any followers in the first place ? That's a Chicken & Egg question... "which came first ?".

Religion, as too Politics, should be something Personal that you follow rather than force upon other's to be chained to. Sadly, we do not live in a Free Society, and even in the USA you're Socially targeted for your Religious beliefs.

Just treat people the same way that you would like to be treated were you in their situation, that's possibly a good Start.