It is those accursed GM vehicles whose alarms goes off, even if you use the key that came with it! I hate my dad's Chevy truck, partly because every other month I hear "can you pick me up at the Chevy dealership? My truck has a recall." And it drives like it has an anchor behind it. And then you must always use the key fob to unlock the door or else the alarm goes off.
I don't like using the key for one big reason: The best way to make sure you can unlock your door from the outside is to lock your door from the outside. With my key, I can physically see the doors lock. And it always works (except with that accursed GM vehicle) even when the battery is dead, both the key fob and car battery.