My downstairs neighbor keeps disconnecting the building smoke detector because he says it "goes off for nothing"

I live in a small older apartment building with six units and a shared hallway. Nothing fancy, but it is generally quiet and everyone mostly minds their own business. The problem is the guy in the unit below me.

For months, every time someone cooked a little too enthusiastically or burned toast in their own apartment, the hardwired smoke detector in the first floor hall would go off for a minute. Annoying, yes. Not exactly the end of the world.

A few weeks ago I noticed something weird. I was bringing groceries in and saw the detector hanging slightly crooked with the cover not fully snapped back on. Later that night I smelled smoke in the hall from somebody's pan and realized there was no alarm at all. Total silence.

The next morning I mentioned it to my landlord, who said maintenance had not touched it. Two days later it happened again. Alarm goes off in the evening, then the next day I see my downstairs neighbor standing on a chair under it with a screwdriver. He looked right at me and said, "Relax, I’m just shutting it up before it starts its drama again."

I told him he cannot just disable a shared fire alarm because he finds it annoying. He said he has asthma, loud alarms trigger panic, and anyway he always puts it back "later." Except later apparently means whenever he feels like it, because last weekend there was an actual electrical smell in the hallway from the laundry closet and the detector still did not sound. I only noticed because I was taking trash out and the air smelled hot and plasticky.

I reported it again, this time in writing, and the landlord finally sent someone out. The maintenance guy confirmed the wiring had been loosened on purpose more than once. Now downstairs neighbor is furious because management gave him a written warning and said the next time they may call the fire marshal.

He has been telling people I escalated a "sensitive health issue" and could have gotten him in serious troubel instead of being neighborly. I do not love conflict, but I also do not think "being neighborly" means waiting around to find out whether our hallway alarm works during a real fire.

TL;DR: My neighbor kept disconnecting our shared hallway smoke detector whenever it annoyed him, and now he is mad I reported it in writing after management confirmed it had been tampered with on purose.