I'll be frank: I don't see Grooveshark's business as inherently more shady than some of the other "act first, get permission later" startups that are lauded both in the press and on HN on a regular basis.
For what it's worth, I'm not a fan of those companies either, but I find it weird that the overall sentiment towards Gooveshark seems to be negative, when there are many other companies that blatantly and openly violate the law as well.
And furthermore, while things didn't work out for Grooveshark, it's pretty clear that Grooveshark (or at least business/products like it) have been the reason for services like Spotify and Rdio. I think it's pretty clear that we wouldn't have music streaming services if it weren't for the long line of services operating at the fringes, like TPB, Grooveshark, Napster, etc. So even if they ended up failing as a company, the gap that they sought to fill a decade ago has been mostly filled by services like Spotify and Rdio[0].
All that said, I agree with this statement:
> But I'd rather laud businesses who manage to combine cool technology with an ethical, sustainable business model.
I just don't think Grooveshark is anything close to the worst offender.
[0] Services which, I might add, have been financed by the record industry itself.