This might be dangerous, but find ways to ruin their high. (I say it could be dangerous bc paranoid and angry tweakers are the worst.)

I recently posted about how me and my daughter once scared off some drunk/high guys and a couple of methheads by using red and blue lights, and a portable speaker that blasted the sound of police sirens. All of the people that scattered were outdoors and did not live in the immediate area. So they fled from the area. However, this ULPT could still work for you even though your neighbors can just hide in their home.

I suggest enlisting a friend or partner for this task... When you're driving home at night, try flashing some blue and red lights into their windows. I'd use flashlights because you can easily click them on and off, move them around to better simulate police lights, and hide them under your seat or in one of your consoles if needed. Only do this for 10 seconds or less. Don't linger too long. You don't want them to know it's you. Every now and then, blast the sound of police sirens with the lights. Again, only for a brief moment.

You will be ruining your neighbors' high (or just general comfort) by inducing constant paranoia.

If they ever ask you about police sirens and/or lights, just respond, "IDK. My security cameras don't aim very far down the street. I think I might have heard something the other night. I thought I was just dreaming, though. I can ask my brother if something has been going on around here. He works for the DEA/local PD." (Take your pick on what law enforcement job you want your imaginary brother to work at.)

Follow up with, "He comes by to visit pretty often. He usually drives a white sedan. You might've seen him parked around here sometimes. I'll definitely ask him if he knows something the next time he drops by. Do you want me to see if he'd be willing to talk to you? He might need more details. Or I can just call you if I find something worth sharing."

This is to induce more paranoia. They might become fixated on any white sedan that might be parked in the area. They likely won't want you to bring attention to them or their house. Next time they see or hear police sirens, they won't be able to brush it off so easily. After all, you said you thought you heard them, too. This is also to discourage them from going near your property. (Security cam, brother in law enforcement, etc.)

Ideally, you want to score your neighbor's phone number. There are many more UPLTs that you can carry out with his number. Set up a free Google Voice account in case he wants your number, too. (You definitely don't want him to have your real number). Try to take a pic of his house. When he asks why you did that, explain that it'll make it easier for your brother to figure out what's going on... the sirens happened in front of his house, not yours.

Every now and then, have a friend stop by to play the role of your brother. Do this when you know those neighbors will likely see you. Stand at the end of your driveway, facing the neighbors' house, and carry on whatever conversation you want. It would be helpful if your friend wore tactical pants and a weighted running vest. (I managed to freak my old neighbors out with my running vest before. 😅 Some thought it looked like a vest for explosive devices; some thought I was chasing a criminal.)

While you guys are talking, have your friend start writing or doodling on a small notepad. Remember to mostly face the direction of the neighbors' house and to periodically look directly at it or their vehicle. Keep a serious or flat facial expression. Bonus points if you're friend can find a walkie-talkie to hang off his belt. It doesn't even have to be functional.

If you ever see one of the neighbors creeping on your property, just scream like they jumped scared you. Except take it up several notches. Get as close to them as possible and scream like you've just been tossed off a 15-story building.

If you ever talk to your neighbors, you should casually ask if they noticed any bugs in their home. Then tell them to be careful. Tell them you've been dealing with bed bugs or some kind of mites in your home. You have no idea where they came from. Maybe from the cat. The bugs make you itch. You can't feel them biting, but you can feel them crawling and the itch will set in within an hour after being bitten. It's a shitty cycle bc the bugs seem to be attracted to blood and warm, wet environments for breeding. If you scratch too hard and break the skin, the bugs will start to target you. (Maybe slap some band aids all over your exposed skin to make it more believable.)

Alternatively, you can just say you've been seeing a doctor about a demodex mite infestation; no treatment has been effective so far. (Look up what those are if you don't already know.)

Scatter some gold flakes around their yard. Or shiny pennies. Tweakers tend to get hyperfixated on little things.

There's always the classic change your Wifi name. Most people recommend, "FBI van" or sth along those lines. I suggest sth not as obvious, but still concerning. I'll have to think of a good one. If anyone else knows a clever one, pls share.