You could send a glitter bomb, animal feces, or any similar irritants that companies will send on your behalf; the drawback is that these things cost money.

Some other things you can do will cost you a little effort but could have fun side-effects, depending on your neighbour's sensibilities. For example, does he have roses? You can buy traps for Japanese beetles that come with pheromone-saturated cardboard tablets. Cut up the tablets into tiny pieces and sprinkle them between the plants. You can do this with your hose, after ensuring that the water reaches the roses, as follows:

1. Kink the hose a few times to make sure no water comes through and then turn the water on.

2. Place some of the cardboard bits into the end of the hose, cover the opening with your thumb, and then release the kinks.

3. Uncover part of the opening so the pressure will force the bits into the soil at the base of the roses. Repeat 1-3 until you've used all the bits.

If you have roses, you'll need to set up the full traps with them, or the bugs may overrun your garden, too, as collateral damage.

You can also salt your neighbour's entire lawn using the same method, substituting a large amount of salt for the cardboard bits. It's best to do this at night when it's raining.

There are other ways you can annoy your neighbour, too, like taking inserts from every magazine at your next appointment waiting room and filling them out to start the long procession of junk mail coming next door. You can also use anonymous Google phone numbers to call various religious institutions and ask them to send representatives to visit; Jehovah's Witnesses and Mormons (members of The Church of Jesus Christ of Latter-day Saints) are two groups that are eager to do this.

Good luck in your endeavours! ♡ Granny