Hi, In my experience, have lived in a large complex, with electronic entry device supplied to each owner. Visitors had to be alerted in advance of course, so someone could welcome accordingly. However, it certainly was critical for security. As Lady P and Sir H point out, a bit of a nuisance too. But everyone was used to it for reasons stated. Agree the method Waterworld describes a no-no in terms of privacy of personal details. In our case, when a device became faulty, it had to be reported to strata and wait for another to be supplied. Fortunately, we had good neighbours to provide entry if this happened. Electronic form of entry, or with a swipe card, is not uncommon; in inner Sydney anyway. Good luck with your privacy argument.