The law is clear: complicity in copyright violation, for profit. It became a criminal offence across Europe in the last decade. This puts costs for prosecution on the state, not rights holders, and it allows for jail time. Whether the law is fair or right, that's a different question. Many people lobbied hard against criminalisation of copyright and patent violations, and lost. The movie industry is just too powerful and had too many friends.

But it's not nebulous. Help others commit a crime, you are an accessory and you are liable for fines and prison.