Because, if you had read an earlier post we took on a farm covered with them, and I'm sorry but we have to make a living farming the place as well as clearing 200 odd acres close in of Burrs.
I nearly won the 3rd year we were here, was definitely seeing a light at the end of the tunnel, then I was laid up for a long time and they took over again, see this
Every tree line, every hedge has burrs in it, the green triangle bit on the right hand side goes to the 100 odd acres, that remains of the horse empire. No matter how much of the field you clear the trees and bushes that are between 2 fences just sprouts the **** stuff, and I have to be careful spraying because I don't want to kill my trees, and the horses LOVE to shove their heads through and eat in there.
I love the idea of the clean up party, it needs something like that otherwise it's kind of like the 4th bridge here, as fast as you get to one end you are starting all over again.
So yes, I get that getting rid of them would get rid of the problem, but it aint that easy