No matter how big a company or industry is it's still made up of people. No they don't need "championing" but they certainly don't deserve to be intentionally screwed by companies and then those companies supported.
Regardless of the law Grooveshark is taking another companies content without permission and making money from it. HN users go ape-shit when someone "steals" another startups website design, why does that sense of fairness and equality not extend to everyone?