I am surprised BS did that, didnt know thy were doing that too. A ISP in the UK has started this aswell, if your PC is a threat to there network and could cause a massive outage, they will suspend your DSL usage until it is corrected, and then they will approve the access once again.
Very balzy of the ISP's to step up and take this measure with all the security threats and virus' popping up lately.
I applaud them for this!