It wasnt great but it was unprecedented so not surprised. They had QR scanner people that would come to you in line and scan your QR code + ID before you got to the ticket checker. So by the time you got to the ticket checkers, they would have just assumed that you would have already had your QR code scanned. Problem was people were standing in one line, getting fed up, then jumping in a new line. So i imagine it was really hard for these QR checkers to remember who they scanned and who they didnt yet. It seemed like it would have been really easy for someone to bypass the QR checkers and just go directly to the ticket scanners. Hopefully that wasnt happening.