I'm sure I read somewhere that London is arguably the worst place in the world to commit a crime as virtually every street corner has a cctv camera on it that the police can access at will for the purposes of investigating crime.
This, while possibly intrusive is sort of acceptable as when I am in public my actions may concern others.
However sat in my own home on my computer I am no risk to anyone so the argument is more about specifically what the question is that the police really need to answer ...
Is this person likely to be involved in a crime in the near future, or have they been in the past?
Unless the crime is a cyber crime / hack then the police are arguably have no reason to want this data from me and they better dam well justify that need!
In the event the crime in question is a cyber attack their efforts should be looking at my target to tie a data trail back to me first.
In the event that a persons online activity supports / in some way aids in a crime the focus should be on the crime not some random large pool of personal information.
In other words, given that the police already have enough to charge me for a crime then I would consider it acceptable for them to supplement their case with my digital activity but their right to dig through that activity should not just be freely available because they suspect me of something.
My reasoning being:
In the eyes of the law everyone in the UK at least is considered innocent until proven guilty, if there isn't sufficient proof for them to charge me then what right do they have to breach my privacy?
DO YOUR BLOODY JOB INSTEAD RELYING ON TECHNOLOGY TO BREACH EVERYONE'S HUMAN RIGHTS!
However, should it be possible to create a system that can automatically find proof that a crime has been or may be in the future committed and put fact with it by using such data and no actual human being can mess with, access, or even interact with this system then yeh in theory I could be ok with that.
I should note however:
Such a system would need to be able to think like a human eg (AI) be able to determine for example the contents of my pockets before I walk in to the bank, and should only send out focused snippets of actionable evidence not raw queryable data.
I would be cool with that.
But could our government / any government for that matter be trusted to build such a system?
No bloody chance!