I don't think the buck would stop with you (I think it's a legally grey area still) BUT your opening up yourself to inconvenience if it's used for something out

I don't think the buck would stop with you (I think it's a legally grey area still) BUT your opening up yourself to inconvenience if it's used for something outright illegal - because your computers will end up being seized to establish if it was you or not. And then there's the potential personal guilt of having facilitated someone committing a crime (I guess that is an individual thing but some would feel it)