The UK ISP TalkTalk was recently spotted shadowing its customers' tracks around the internet. The excellent NoDPI.org has a comprehensive summary of why this is illegal (TalkTalk becomes StalkStalk).  Interestingly the man in charge, despite claiming to have deleted all emails from one protester has had his legal crew write an apparently evasive letter. As with the BT-Phorm debacle, it's going to be interesting to watch this unfold...buy I can't see the UK regulatory bodies acting with any great rapidity if prior experience is anything to go by,