You want to ruin someone's life? Plant some fucking greenbriar on the property. Genus Smilax. Thorny vines that grow from rhizome-like tubers in the ground. Grows a little slower than kudzu but I'd rather be around kudzu. Harder to eradicate than white supremacy. Once it's got it's little tumors in your soil, it's over forever. It'll sent shoots out just under the grass to spread out like strawberries. If you get both genders of the plant in one place, the females will grow berries that the birds eat and then they'll shit the seeds everywhere, the complicit little fuckpukes. If you don't dig up ALL the plant, it'll just grow back harder. I've seen them strangle a dogwood tree to death. They'll grow 40 feet high if they've got something to climb. There is no commercial, medical or craft use for them. The leaves have a waxy coating that protects them from herbicide. I haven't tried fire yet but it probably won't work.