> Interestingly there seems to be a loophole in that they can collect the data regardless of consent, but can't use or share it without consent. So chances are this sensitive data will be recorded and put in a database anyway, even if they're not lawfully allowed to look at it without anonymizing first - but a future law could also add an exception, keeping things for law enforcement for instance.

I'm not all that worried about law enforcement. I think it is much more likely that the database will be hacked and the data will just get shared that way.

The only way to protect private data is to prevent the ISPs from collecting it in the first place. Otherwise, everyone knows the ISP has the data whether they share it or not, it's a big juicy target, and it's probably not that difficult to get to.