Stupid car alarms ....

Friday, around 3:30 am, the neighbor's car alarm started to go off. The car alarm in general is very annoying. This one was 10 times worse. Maybe becuase it was in the middle of the night and it kept tricking us ... "beep beep beep <2 minute pause> beep beep beep beep beep beep beep <5 minute pause> beep <3 minutes> beep beep <1 minute pause> etc etc"
Sometimes between those breaks I would almost be back asleep and then wham, another beep would sound.
After about 30 minutes they managed to turn it off. We heard htem out there for about 10 minutes ... we think they didn't know how to turn it off and had to spend some time figuring it out. Whatever. They did figure it out. WE went back to sleep.
Yesterday I was speaking to a third neighbor. She never heard the alarm and told me that the neighbor in question didn't have any alarms but could have gotten one installed. So when dh came home I immediately asked him about it, thinking it was all a horrible dream. But no, he said, the car was beeping, and he looked out the window and saw the lights blinking on the car.
Fine.
So last night rolls around. First of all, I already didn't feel good. Yesterday was not a fun day for me either (the short version: the washer overflood and flooded the bathroom and dripped water through the floor since it's on the second floor). I was tired and wanted a good night's sleep.
At the same freaking time that darn alarm went off again. We waited about 1.5 hours before dh decided to go knock on their door to see if he could offer advice on how to turn it off. He went over there and knocked, and knocked, and knocked ... no one's home. We looked again and saw one of their other vehicles gone.
the alarm went off until roughly 6 am. That is at least when I finally fell asleep. I physically moved to a room in the back of the house and turned on a TV to a music station and it mostly blocked all the beeping. Although, I could barely hear it and 6 am is when I finally conked out.
I am so flipping mad. Why would a car go off two nights in a row at hte same time? If it stopped beeping at 6 am, does that mean the battery is dead? Or if they don't come home until tomorrow, does that mean that tonight at 3:30 am I should just figure on waking up and listening to the beeping again?
I sure hope not. I need my sleep. Seriously, don't mess with my sleep!
I hope they come home today. Dh and I plan on telling htem about their lovely car. Maybe they'll do something so it doesn't go off again tonight. Or else I will grow horns around 3:30 am and it won't be pretty!!!