|Also you need to consider using other means to reduce bits.|
One is simple spyware removal. Second may be to use a good hosts file and get firefox with script blocker.
Then tell your kid to stop downloading junk or let him pay for the service. Remember you are in charge. Aren't you?
If you have a good home router it may be possible also to limit things like torrents. They are illegal and could set you up for a very large fine. Also one can limit times with these.
Why did it take me over a year to phone in a problem to ATT?