Should cafes be bankrupted because a customer downloaded some music on the store's wifi hotspot? If you lend someone a hammer and they use it to smash someone e

Should cafes be bankrupted because a customer downloaded some music on the store's wifi hotspot? If you lend someone a hammer and they use it to smash someone else's window, you're not liable for that so long as you didn't know that's what they were borrowing the hammer to do. I think, generally, you should never be in a situation where you're liable for crimes someone else committed without your knowledge and assistance.