Anecdote: one time I was visiting a friend in Singapore, they were busy when I arrived so I loitered around their apartment building's elevators for a bit, wait

Anecdote: one time I was visiting a friend in Singapore, they were busy when I arrived so I loitered around their apartment building's elevators for a bit, waiting for them to finish so they could push the intercom button to send me up. I tried the fire entrances, but they were all locked. Anyway, later that evening, some people from the government came to my friend's apartment and demanded to be let in. They demanded ID of everyone in there, including myself, as well as my address, and also checked my friend's lease. They even barged in on my friend's roommate who was showering. To this day I've got no idea why it happened. Singapore may be very modern, but deep down the government is still very authoritarian. Funnily enough, I lived in mainland China for a couple years but never experienced anything like that there.