Are the creator/contributor of a social network/media responsible of the user-activity?

**If a person creates/contributes in creation of a social media/network. Is he responsible/questionable of the user-activity? Does niyyah/intention play a role?** For example; lets imagine "x" was created by a person/team, "x" permits halal-haram content. Is the creator of "x" responsible for the haram content. Does the creator/contributor have a share in the haram(sin), the user shared/posted on "x" ? As it is prohibited to cooperate in sin: > .......cooperate with one another in goodness and righteousness, and do not cooperate in sin and transgression. And be mindful of Allah. Surely Allah is severe in punishment. [5:2] "x" could also be created for a client. *This is a generalized question, and is often asked by application/website developers.*