That's is very mature of him to own up to the usage and to pay for it himself. A few more extra charges and he'll get the hint and not want to continue going over the cap.
This isn't quite as extreme as cutting off the internet completely, but it does fit in with the thought of managing the WIFI usage. I'm sure you've seen it before as well. It takes a bit of work on your end too, since you have to manage the password each day.
:biggrin:
http://imbrittanyking.com/wp-content...16/08/wifi.jpg

