Earlier quoted context omitted.
How are those services trampling on anyone's rights? Despite loving Grooveshark, I tend to agree that copyright has some meaning and purpose. I don't think taxi companies have a right to business just because they were there first.
The subtext is that they're pushing on and in many cases breaking regulations (on carriage service and short-term tenancy), and also externalizing their costs. I happen to believe that's actually true in both cases, but that doesn't make what they're doing equivalent to building a business on someone else's proprietary IP.
Fundamentally, if I own a property I should be able to allow/disallow access to anyone as I see fit, and charge appropriately. If I make money, I'm still obligated to pay taxes on it (therein, I imagine, lie the problems).
So I'd claim that AirBnB and Uber are helping push for more sane regulations which allow free-er markets, while Grooveshark was basically just short of directly-stealing the content of others to profit on themselves.
That said, I'd still rather have Grooveshark than not, because I personally don't care so much about the record-companies rights - but certainly the government should be there to help uphold the rights of individuals and businesses, which, alas, means legal trouble for Grooveshark.