Right after Christmas in LAX checking in with Delta. There was a huge snaking line for regular screening, another huge line for Priority and 5 people waiting for PreCheck. Another time in CLE, a real long line for security and a completely separate area for PreCheck with absolutely no other passenger. The lady who operated the luggage scanner was sitting in a chair half asleep. They woke her up to scan my carryons. If it weren't for rousing her, I would have been through in 30 seconds instead of a minute.