I use the Signal a lot and have never been nagged to share my phone number.

Yeah that one (off Italy coast) ended up being blown up by authorities. There was a movie about it.

So the person you are downloading from is breaking the law but you are not. Odd law but I envy your situation.

I don’t trust that the lawyers weren’t bribed.

Look at the Men At Work plagiarism case regarding Land Down Under. That was a transformative work yet the band lost the case to the estate of a nursery rhyme.

Isn’t the download a share?