Care? Do something!
Like many others I have watched from the sidelines as authoritarian legislation creeps up on us bit-by-bit. I've spoken to my circle of friends about it passionately but without seeing any lever to make a difference.
Some of the terms of the Terrorism Act 2000 are likely illegal under UK obligations to the European Court of Human Rights - specifically detention without arrest, detention without legal representation, obligation to hand over possessions, obligation to provide information.
I wonder if this incident could be a catalyst for at least reigning in the excesses that the state is guilty of?
Individually we cannot hope to make a difference but if each of us takes 15 minutes to write to the Prime Minister, the Home Secretary (as Minister responsible) and our Member of Parliament then combined it might poke their consciences and remind them that we elect them to represent us, not to represent authoritarian state agencies that break the spirit and letter of the law.
Write on paper rather than email - they and their officials have to spend time replying individually rather than firing off a single canned-response email.
I recently began planning and implementing encryption of all my Internet traffic and servers by default including using only HTTPS for the web sites I manage, deploying Apache 2.4 and Perfect Forward Secrecy, VPNs for all traffic moving over my ISP's connections, digitally signed and encrypted email using either or both of S/MIME and PGP. Many of those are using layers within layers of encryption on the same basis as The Onion Router.
I do it not to protect my own traffic, but to make it harder for the illegal and immoral snooping of routine Internet traffic topick out those that have a legitimate need for such encryption. It is much harder for NSA/GCHQ to analyse patterns of meta-data or content if everyone routinely uses high-grade encryption.