"For security purposes"
"I’m sorry, sir, but for security purposes, I’m going to have to ask for the following information, otherwise we can’t proceed…"
"Just confirm your name and the first line of your address, please…" = Acceptable.
"…and the postal code…" = The full address; a little less acceptable, if only because you tried to trick it out of me.
"…and now just your social security number and date of birth, thank you." = Are you fucking serious? To buy a pair of SHOES?!
- Big Brother, our friendly oppressor.