Maybe try to actually prepare your kids for these moments instead of trying to restrict them so hard. Teach them how to use a computer for real, instead of sitting them down at a hyper-restricted one for an hour a week.

Would you let your kids get a driver's license without teaching them the rules of road safety? Would you let your kids cook without telling them the stove is hot and will hurt them? Do your kids know not to let random people in the house?

Or do you just helicopter them so they never experience danger?