Im talking about the grass that grows several feet high and is found in wetlands. It has long thin leaves that stick to you and cut you. I remember a post a while back about plants to deter people. I can tell you that walking through it to find an arrow is not fun in shorts and a t-shirt. It hurts like a ***** too and the cuts are usually 3 inches long. I figured that if you planted alot around your house it might deter an undetermined person. Also when you plant the seeds put razor wire or barb wire over it so it grows through it for a 1, 2 punch. The grass would help hide the wire.