I'd suggest if anyone tried that to me I would be pressing charges for fraud.......you can blame incompetance or the 'computer' only so many times.....and is often used to hide behind.
More seriously though, they're out to get you and the pax list probably has an asterix next to your name to ensure bodily fluids are added to your inflight........make sure you change/swap seats with some other pax once onboard......now there's some sound advice!
Then again, if they are that incompetant, they'll probably sabotage the wrong passenger inflight and, knowing your luck, you'll probably swap seats with the unlucky pax!