How many parents allow your helper to use the home computer?

I know of friends who let their helpers use their computers to Skype or Facebook with their family back home. I am personally comfortable with it if she accesses the computer with my permission and at a set time/day, for instance, at 9pm, twice a week, when her work is done for the day. My helper need not use the computer as she uses her own phone. But I think, be it the home computer or her personal mobile phone, the key is to set ground rules - to only chat when her work is done and that she seeks permission to do so, especially if it is on your personal computer.