Make his house the most famous house in the state:

https://youtu.be/CAqCrRVguJo?si=nuEZgdBpJecz6vVb

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.

If his TV is close enough to the window to see what he’s watching, and you can find a remote with enough range to change the channel from your own house, well, you know the rest.

Put a yard sign up that says “future home of thousand wags dangerous animal shelter and child sex offender rehabilitation facility”

Look up where the property line really is, and if the neighbor is encroaching get it surveyed and enforced the the new owner can reclaim part of the neighbor’s land

Roundup a big dick into the grass. Won’t show up for a week.

I heard of this funny trick where you put a bag of ice over the pilot light of his boiler. The boiler will put out gas until the ice melts and the pilot light comes back on.

And let’s justr say, that’s when the prank really ‘pops’ off

If your, erm, “friend” is planning to but has not sold your his house, then this is an even more terrible idea that asks for trouble.

If Canadian, chuck a bag of milk in his eavestroughing. The heat will rot the milk and the bag will degrade in the sun till one day it fails, releasing STANK.

Make him a cherry pie and leave it on the porch.

I don’t know what kind of neighborhood it is but sprinkling cat food or something like that everywhere would probably attract something. Your friend could even do it to his own yard. I’d be weirded out if my neighbor moved and suddenly his yard had 25 raccoons in it.

Order some joke/fake lottery tickets. One of the ones where every ticket wins $30k. Drop one on his driveway before he heads to work in the AM for him to find. I’ve only done this to two people and they both fell hook, line, and sinker for it. One lady was calling her husband to come pick up the winning ticket to keep it safe.

Throw wildflower seeds (non invasive) over onto his perfectly manicured yard.

Another one is a long con: befriend crows, get them to come to your friend’s house to feed. The neighbor will likely sho them away which will aggravate them. Crows hold grudges for a REALLY long time and only shit where they don’t eat, aka his yard.

Don’t. We’re all stuck on this little ball of rock together, and making each other miserable just makes life worse for everyone.

Dox them. That’s real funny when cops kill civilians.