That works until they run into a second person. In a big corp where people don't recognize each other you can also let the bad guys in, and once they're in nobody thinks twice about it.

or it could be some troy maybe.

late reply but, no, i really needed to hit the button but didn't have valid ID at the time. My driver's license was expired and i couldn't get it renewed because of a outstanding tickets iirc. I was able to talk my way in and had been there many times before so knew my way around and what words to say. I was able to do what i needed before another admin came up and told me that without valid ID they have no choice but to ask me to leave (probably like an insurance thing). I was being a bit dramatic when i said "getting thrown out" the datacenter guys were very nice and almost apologetic about asking me to leave.

There's some computer lore out there about someone tripping a fire alarm by accident or some other event that triggered a gas system used to put out fires without water but isn't exactly compatible with life. The story goes some poor sys admin had to stand there with their finger on like a pause button until the fire department showed up to disarm the system. If they released the button the gas would flood the whole DC.

Essentially yes. They should really divide data centers into zones and only unlock doors inside a zone where smoke is detected.

Don't ask about fire power switch