I'm Swedish myself and I have Bahnhof as my ISP. They are a company which builds much of their image on issues such as integrity and privacy, and that image is what got me to choose them over other options which were slightly(!) more expensive. So, all the sudden you have a company that gets a lot of appreciation from the public, and it's not like they are spending more money on their infrastructure just because they do everything they can to avoid tapping their customers' traffic.
This seems like a no-brainer decision, which is why I find it hard to understand why it's not like this everywhere.
I think you are grossly overestimating the amount of thought the general public puts into which ISP it uses (when it has a choice).
Most ISPs in Sweden would react this way, but if you want one ISP to rule them all, that would be Bahnhof.
Now that's an ISP to be with, regardless of whether they are the cheapest. The cheapest would cave to avoid the lawsuit, instead of using your money to set precedent for Sweden.
(The studios tried the same thing in Australia, and iiNet put up a fight and won. Sadly iiNet was later bought out by another company and might no longer be a champion)