I'm more afraid that the use of a VPN will actually become less secure than without using it. ISPs are governed by different laws ensuring your privacy (to some extent). VPNs aren't subjected to those laws and can thus, legally, sell you out long before your ISP ever could. Sure, the potential outrage for such behavior is probably enough to convince most VPN services to never do it (although a secret agreement with MPAA or similar is probably tempting for many) - but you get no extra protection against the law.

Since the moment someone has a warrant against you both the VPN and your ISP are obligated to cooperate you really have nothing to gain, in theory, from using a VPN in order to pirate.

There is one exception and that is if your VPN resides in a different country, then filing a warrant is probably trickier but with time this hole will probably be a lot smaller (at least within countries of EU etc.). And having a VPN in another country is of course not the best thing you can do performance wise.

That or the absurd idea that VPNs is to be criminalized. I wish it was a joke but politicians are seriously considering it.