Well, I don't know what's best, pat-down or scanning, if the scanner's software don't show nude images of people as stated, I think I would prefer the scanner. Obviously it doesn't guarantee that you don't get a pat down as well, but I believe that in most cases the metal object can be identified as unharmful directly on the scanner and you are free to go (e.g. a zipper, metal button wristwatch etc.). You should have the option to opt out of the scanner and get the full treatment as well, according to EU rules here: http://europa.eu/rapid/press-release....htm?locale=en

BTW WTMDs in CPH are set to also alarm randomly even if no metal is detected, probably this is the case in most other airports as well. Sometimes the screener even tells you that you were selected randomly for pat down (mostly if the passenger look confused and say "but I have absolutely no metal on me when the WTMD beeps.")