Best way to approach right now would probably be if you get gunpointed by the people growing and told to leave, and then shoot them when you're far away and safe to do so.
Yeah in no way should they kos and reports should be made. Its 2.5 to just straight up kos there. If it looks like people are going towards the planters you can obviously defend your planters. But just straight up kos shouldnt happen.
Although I do agree that it does make it a bit of a...
I dont think it should be disallowed. It only requires crouching/ladder into the sewer, not at the actual places people grow.
Its a nice hidden spot for people that like the challenge.