Spikes
Wow, after reading the first couple of threads, that's not what I pictured them to be. That looks like a metal sharks tooth and something that could really do a lot of damage or harm. I hate when people do that. It's one thing to lay a couple of logs across the road to send a message, but to put spikes in the ground, is a horrible way to keep people out. I used to ride my bike everywhere as a kid and found all sorts of stuff like that in areas where people were tired of 4-wheelers and dirt-bikes going. Someone put a bunch of twisted up tree spikes behind the country cupboard a long time ago. We threw as many as we could find into the swamp nearby to get rid of them. And Arawak Pit near Elwood had a whole bunch of wooden strips with nails driven through them to keep kids out. A friend of mine was rushed to the hospital after someone put up a cable in the middle of a trail he rode all the time without putting ribbons or anything on it. He ran into it and it destroyed several internal organs and almost died. I've also seen what looked like a box of roofing nails scattered around in some areas which would be a good way to ruin someones day as well. Some people just don't think that nearly killing or injuring someone is not worth them being in the wrong place. What ever happened to walking up to someone and telling them to leave.
Kevin