Part of me wants to say 'bring it on'. I once said to a copyright lobbyist that I think applies here: "Don't try to out-internet kids". Allowing police to hack into computers will start a war between law abiding citizens and police hackers. The cops cannot win that fight. Everyone will mobilize against them. Their malware will be studied and published across the planet. And it will certainly help push people away from proprietary systems in favour of f/oss.