I have some unruly skateboarders that come to my business on the weekends and jump from the sidewalk out to the parking lot. It's an elevation change of about 4 feet and there's a landscape terrace from the edge of the sidewalk about 6 feet till you hit the parking lot. I had some no skateboarding sign at that point, but they used landscaping stone to knock that down and steal it. Short of spending alot of money on security cameras, I thought I'd put a 10 foot tall Hawthorn bush there. A local nursery has one, but I'm not sure if I just plant it how easy it will be to rip out of the ground? I don't want to spend upwards of $200 if they're going to knock it over, drag it out, or kill the thing. Any thoughts on this solution? It has nice thorns. Kids today have zero respect for private property.