[ShaneOG]

Most likely, not very.

Do you honestly think someone who wants to steal a computer will use their own access card?

[freiheit]

If the area/door is busy, they just might. Or they might tailgate through a door.

Tailgating through doors is a lot harder when everybody knows that the doors log everything.

[at-fates-hands]

I think you'd be surprised how many people never think about details like that in the commission of a crime. Also, stealing laptops and computer equipment are crimes of opportunity and rarely do people plan out extensively how they can get away with something like that before they do it.