[zht]

I think it's more like you buy an abandoned house where people used to go buy drugs

you buy the house and people are still coming knocking on your door asking you if you have any drugs to sell

you're not doing anything wrong, but if the police notice people constantly coming to your house to buy drugs they may do something about it

[rvnx]

Other perspective: It's more like you reopen a public place where people were known to publicly harm copyright owners and you provide technical help so they can do it again.