Probably unpopular opinion: Most of these are just the weirdness of the language caused by the (not-so-wise) design decision that those simple operators should never throw. In my opinion, these are not footguns and should not be used to attack JavaScript, because regular programmers are very unlikely to run into them (which is why when presented, they seem so obscure).

However, that is not to say JavaScript is without footguns. For example, the classic `[1, 2, 3, 10].sort()`.