ISPs, law-enforcement agents?

As always in cybercrime, ISPs are at the forefront of the battle of piracy. This time, they are expressly thought as law enforcement agents, either voluntarily or "coercively". But implications does this new role have? safeguards in terms of HR protection?
Are they other domains where they become or are effectively law enforcement agents of a given State?

http://news.zdnet.co.uk/communications/0,1000000085,39290428,00.htm?r=1

Hackers, DDOS and government - motives and legal issues

The Estonian government, earlier this year, faced a major cyberattack. Motives are unknown, but the disruption was important. Many features of Estonian life rely on computers: parking for example is computerised

http://news.zdnet.co.uk/security/0,1000000189,39290289,00.htm