I don't think car alarms detect these kinds of vibrations. It's specifically tilt and more impactful stuff. Certainly, the alarm is never going off when I get my car back via the lifts that I've used. It's probably too smooth.

The problem will be aftermarket car alarms. There used to be a car that parked on the street near my apartment that would go off ever time a bus went by it.

Some OEM systems are sensitive too. My mother has a Hyundai that triggers the alarm whenever a heavy truck drives by.

There's even a somewhat famous song about that: https://www.youtube.com/watch?v=6Z-8vy6sPQQ

Car alarms go off all the time on ferries from cars that really don't like being locked and moved.

Ferries tilt and jolt in a way that predictable-path car lifts don't.

Yes I see this all the time on BC ferries. Usually an Audi or similar

I asked this once in the past, but...do car alarms actually stop any actual crime ever? My entire life, every time I've ever heard a car alarm go off, literally everyone around just rolls their eyes and ignores it. If I actually looked up at a car alarm and the person outside the car just said "I'm so sorry! You know how it is", I would probably just nod and move on without really taking the time to figure out if it was really their car (because even if they were breaking in I don't have any desire to risk an altercation with someone doing that, and even if I were inclined to call law enforcement, I'm pretty sure they wouldn't come do anything because some random car's alarm is going off).

I want to be open minded that I'm missing something, but I can't help but feel like car alarms are just security theater with a side of nose pollution.

Pretty sure the alarm cares more about tilt than vibration - indicates towing

Illegally parked Cars are regularly lifted up and put into the back of flatbed lorries or towed away on back two wheels so this is arguably more gentle!