Great ideas Malgus, we are just now creating a list of poisonous and thorny bushes to plant behind our barb wire fence. We try to find plants that not only act as obstacles but can also be used for medicinal or other applications.
I love the tangle food idea. We have one area that is most likely be used by burglars coming in and this seems like a nice little trap to set.
Alea iacta est ("The die has been cast")