Back in 78 a rancher I sometimes did odd jobs for in college had me make a mail box out of schedule 40 pipe and 1/4 flat plate. Welded it all together ground it all off where it looked like any old mailbox and then welded a Sche 40 ten foot section of 4" pipe to it. He turned it upside down and poured it full of concrete and then sunk it in the ground to the proper height because he was tied of the local college kids tearing up his mailbox.
He ended up in court. Seems there is an issue with creating an attractive hazzard. the mailbox nearly killed tow guys that drove by it and hit it with a baseball bat shattering the bat and the idiots wrist. They were so pissed they turn arround and centered it at high speed. He spent far more money in court defending himself not only from criminal action by the county but also civil by the idiot driver, that he could have replaced one mail box a day for the rest of his life.
Theres a mentality out there that you cant defend your property with violent action. Its much the same logic as you cant bobby trap your front door with a shotgun.