'Twas brillig, and the slithy toves did gyre and gimble in the wabe

Yep, they do come out if it's between midnight and 6 am (have seen it a couple of times here).

The kitchens actually have heat detectors (not smoke alarms obviously), so they only go off if it gets very hot in there (probably by "hot" they mean "the heat detector's on fire!").

Yup, that's a grand example of idiocy. I bet he's glad that you actually spotted it!