don't you agree that porn stores also need to hear the good news?
When i was still a JW, a brother that i was good friends with, worked in a small video store ( if your under 20, you might not even know what that is). In any case, video stores had an adult section in a separate room. The elders from our congregation would often pass by the video store, and check if this brother was inside the adult section. They actually challenged him a few times about handling adult videos, stocking them, returning them, etc, which he often had to do.
It was kind of a grey area, but despite the complaining, they never actually threatened him, or took any action.