On 6/17/07, Frank Bulk <frnkblk@iname.com> wrote:

In the 2+ years I have been working for an ISP I'm not aware of one customer
that has gone over to one of our competitors because we identified and cut
them off for an abuse issue.  Most of them have been very grateful that we
identified a problem and are earnest in resolving it.

I'm pretty sceptical of the notion that it's easier to change ISP than download a Windows update.  If that's true for your network, perhaps you should tell us something about your provisioning/billing/CRM arrangements!