Get a robe w/hood and a candle and slowly walk around your yard at night chanting omm...omm...omm.
Get a desk lamp and put a spotlight bulb in it and aim it at their window and leave it on all night.
Shut off all the lights in your house and sit at the window staring at them over a candle.
Invite friends over to join you.
Place a mirror over the window reflecting back at them.
Have a party and invite all your friends and them too.
Then, if they don't show up, send friends over to their house all night long to find out when they are coming.
If they do show up, when they leave, send friends over to invite them to the party. Again and again.
Play Godzilla's roar on a loop all night long and into the morning...LOUD.
Face all your lawn ornaments at their front porch. If you don't have a yard gnome go buy one. Oh, and pick up a few pink flamingos and face those at their house too.
Put a stuffed animal on a leash and take it out in the yard and stand there watching it. After a bit, bend down like you are picking up its dodo with a napkin and put it in your pocket. Then take you and stuffy back in the house.
At the kitchen window, make a deal out of washing stuffy and smelling his but to see if its clean yet. Then, smile at them thru the window.
Sounds like a good way to get me committed lol. I could see them taking videos and putting it on social media lol