I absolutely hate the idea that if you've done nothing wrong you won't mind snooping. It's like saying that freedom of speech isn't important because you have nothing to say. Privacy is a right, you don't need to have to justify why you have it or why you are using it, just like you don't need to justify why you have freedom of speech. I do have stuff to hide, but it's not terrorism or paedophilia or a human trafficking operation, it's just my private business that I wouldn't feel comfortable with random people looking at. I simply don't trust the security agencies with access to my private information.
I've got quite into privacy since 2013 when they had all those leaks and made a lot of effort into minimizing my footprint. It proved to be a lot harder than I'd thought and as such was a real eye opener into just how vast it all is, how much data is being sucked up on everyone, and how much effort you have to put in if you want to avoid being tracked. I do things like using a foreign VPN provider to hide internet usage from my ISP and using PGP to encrypt my emails to others who feel the same and use open source software where possible. Far from foolproof (I don't believe there is such a thing) it nonetheless makes it more difficult for me to be watched. It also has more mundane benefits, my use of a password manager which generates very long and complex passwords for each individual account online meant I didn't need to worry about the DadSec hack, as I wasn't using that password across multiple sites. All I needed to do was change one password, the one I use on MN.
When we talk about the need to defend the country, there is no point in doing that if we have to eradicate those freedoms to do it. If we need to become a surveillance state in order to fight terrorism then we have to ask is it really worth it. There will always be terrorists out there and they will never all be completely defeated so just how much of our freedoms are we willing to sacrifice in the name of fighting a war that by definition can't actually ever be won?
Pacific re the tesco cards I imagine it's just people trying to find an acceptable balance between privacy and convenience that works for them. I refuse to use credit cards and clubcards for this very reason, I do not want Tesco or Asda or the state to have records of my purchasing history and trends, so I use cash for almost everything. But that's a big sacrifice and it's totally understandable for others to feel the same about privacy but not be willing to make that big step.
Ok I'm sounding the all clear you can come out now the rant is over.