I would think the only thing you would get out of such work is a sternly worded cease and desist from a big entity so you might as well open-source this and let somebody else take the torch in case you are shut down.

I mean I'd use such software (and huge DBs like that of Skytorrentz) for research purposes because to me distribution is hugely interesting as a hobby but many courts won't see it that way, and we know a lot of them are influenced by copyrights holders.