I don't even bother raising it as a problem these days. More effective is to implement it exactly as specified so the designer is happy and the the managers are happy and the client is happy.
Then a month or so later, "accidentally" introduce a regression. Oops, the checkbox isn't checked by default any more! Nobody is thinking about it by then, nobody is checking it, and nobody will notice.
Then a month or so later, "accidentally" introduce a regression. Oops, the checkbox isn't checked by default any more! Nobody is thinking about it by then, nobody is checking it, and nobody will notice.