Hi hopefully i can shed some light on the 'scanning of tickets'
at a recent all american rejects gig i was pulled aside at the venue door and my ticket was ' scanned by one of the stewards he then asked me for some proof of identity , which i produced!
He said to me they scan on average one in ten people at certain venues this changes from time to time
there is a barcode on tickets and they run what looks like a t.v remote control over the barcode and all your details ( credit card number used to buy and the address the tickets were sent to ) come on to a small screen!! so as in all things you pay your money and take your chances!!
i hope this was helpful