If i had kids i wouldn't be there friend as much as i
would be there parent. And no i wouldn't do that but,
who said you could mess with them and make them think
your checking on them , i mean till there 18 there pretty much
under your house rules you pay there bill's cloths , Dr , food etc.
The only way i would see a need like you said would be if they were
dire circumstances but, leave them to there on devices to a point.
I mean how will they learn if you don't let them make mistakes thats how
they learn about life.