[chinesempire]

The fact that you didn't doesn't prove you shouldn't

I'm not from US. I don't know the technicalities, in Italy for example you should declare who's residing in your house, even if it's a no paying guest

Many don't, but it's still a requirement

BTW the point was anonymity is not about being anti social, it's about hiding your true identity

If you stay home and never talk to anybody you're being secretive, but probably are not anonymous (police can still come and knock at your door because neighbors called then since you came in and never went out, for example)