Erm,I think we know what face time is!!
This is MUMSNET, you know, for mums..online? Which means we know how to use, you know, technology?
I have a 7 year old. We use FaceTime together to talk to friends/relatives (we live in another country so do this often) .
We use our iPad mini, actually (ooh, see how advanced we are?!)
BUT, she's 7. I think it's inappropriate to give a 7 yr old free reign to walk around a house talking to friends using a camera.
My dd hasn't even got to the stage of asking to use the phone!
I like it like that.
My dc's are allowed to play on my iPad, with me in the same room.
Or on the mac, again with me around.
Bit I think it's quite bizarre that your dd and her friends all FT each other like mini adults?
And after the first instance of accidental nudity, that would have been the end of that.
Like people have said. YOU are the parent? If you don't like what's happening, make it stop.
Disclaimer: I also have a GSOH, but your post isn't funny, it just makes you sound ineffectual