as tempting as it would be to take the plant(s) i wouldnt.

i would possibly snip some and make a clone but if u were caught doin that they might not believe u and well...

also, if i had enough property where somebody started growin on it, i wouldnt do shit except leave a note saying to transplant that shit outta my property

and if i ever saw somebody near a plant i would wither just leave em be or if they looked like the type of person i'd talk to (well they ARE planting weed...) id just say that i wont tell nobody and i wouldnt blackmail him or nothin but id be like can i get a bit when its done, if not its cool