> But on a site like Khan Academy, where the end goal is to learn something useful, all the user is doing is cheating themself out of the thing they signed up t

> But on a site like Khan Academy, where the end goal is to learn something useful, all the user is doing is cheating themself out of the thing they signed up to get. Let them go nuts. If they want to go through a course, but go out of their way to avoid actually learning anything, that shouldn't cause the site owner any grief whatsoever. Yes, especially since Khan Academy can't totally prevent cheating. For example, one can always create two accounts, one that is used as a draft to get hints and the second one that will enter the correct answer after the hints have been showed to the first account.