See this account.

Filesharing itself has been discussed here many times, for example "downloading music".

I'm interested in the concept that a manufacturer is responsible not only for what s/he produces, but what other people then do with them.

Can we expect kitchen cutlery producers to be prosecuted if someone uses a knife they made for a murder?

Or staying in the computer field, can Microsoft be sued if someone uses their C compiler to write a filesharing program?