Pols today show that Trump only has a 2 % chance of winning reelection in 4 years . I saw it on the news , must be true . <| sep |> Loss prevention and other types of abuse prevention operates on a pareto princicple 10 % of people are always rule abiding . They will never steal or exploit a loophole , even if doing so would benefit them . Obviously , we ' re being reasonable , anyone would do anything if you paid them a billion dollars . 10 % of people are always exploitative . They will always steal or exploit loopholes , given the opportunity . There is nothing you can do to change that behavior . 80 % of people are on a spectrum in the middle . They may or may not exploit a loophole depending on the situation . Some people might do it unless a sign or person tells them not to . Some people will try the obvious approach e . g . checking if the door is unlocked , but will give up easily . Some people will do it only if the risk or consequence is very low . Some people will do it only if it takes less than ten seconds of their timeIt ' s that last 80 % that you ' re trying to change the behavior of . If disallowing the character gets 50 % of people to avoid trying to beat the system , that ' s pretty good . Combine that with disallowing the most common disposable mail services , and you ' ve probably reduced the fruad rate by 85 % or so which is good enough , even if its not perfect .