First question.
Find out how much their overwelming amount of traffic is. If you have not updated your PC lately and you have XP you might have had to download SP1 (up to 140 meg download) plus other updates you could get over 200 meg easy ask them if they have a local server to get your windows updates from so you are not taking so much bandwidth over the internet.
Make sure you are not running kazza/winMX/edonkey/any other file sharing software that might be getting hits/bandwidth.
EDIT: and run a full system virus scan with updated dat files. If you dont have a virus scan software or your can not update your dat files use something like
AVG Anti-Virus
Question 2.
No.
Even if they should be required to they will not.(I am not saying that they should be)
