Rollins College in Florida has increased its fine for students with
infected computers to $100. Despite repeated warnings, nearly
1/3 of the 1,100 students ignored instructions to install the
patch and anti-virus software. The College sent teams door-to-door
on campus looking for infected computers to fix them. Even after
that, 35 students still didn't fix their computers, and the college
turned off their network access.
In Anchorage, the cable modem provider has started cutting off 500
infected customers. When the customer calls in, GCI won't let them
re-connect to the network until they fix their computers. Which can
be a difficult process for some customers since the only way Microsoft
distributes the patches is on-line.
http://www.adn.com/business/story/4002138p-4023398c.html
How many other ISPs are turning off customers due to worms isn't
known.