There are two different issues here. The first is the complaint about trepassers that fall into a categorization of "this group"--presumably a well intentioned collection of Christians committing the unpardonable sin of evangelizing. The second issue is trespassing--an issue that "no trespassing" signs would seemingly address to "this group" and ALL other groups! Nobody would reasonably dispute the right of a landowner to bar trespassers, especially (apparently) trespassers falling into the category of "this group" (meaning evangelizing Christians). Neither issue really has anything to do with the other yet look how quickly some of you were to condemn the trespass because of the group committing the trespass.