You've clearly never had a 12 year old spew all the seven dirty words at you (and some I had to look up)
What are you protecting kids from at this point?
You never set a standard based on a worst case scenario. Just because 30% of 12 yr old kids (btw I made that number up) are swearing left right and center does not seem logical to not protect the other 70% from swearing.
I'm pretty sure it does. It's like protecting them from idolatry or hereticism, at this point.
12? I knew all there was to know about cussing at 7, and I'm well into my 30s. Oh and there was no internet at the time.