Do you run an ISP? Because it seems that the ISP's also believe that only people breaking the law have large data transfers. Which, as we know, is an idiotic belief.
By and large ISPs really aren't going to actually care what you are downloading. Whether you are breaking the law is irrelevant (unless they get pressure applied to them), all that matters to them is how much data you transfer from external networks - and consequently, how much you cost them.
The fact is, getting sued aside, someone downloading 100gig of Linux isos is just as damaging (costly) to them as someone downloading 100gig of copyrighted movies and games.
It's actually one reason why quite a few ISPs host their own binary news servers, as it will cost them less for people to be downloading from there.