Unsanitized-input Memes

When 10-year-old you discovered eval() and thought "this is the most elegant solution ever invented" without realizing you just created a remote code execution playground. The input field literally says alert("hi") and the app helpfully executed it, producing some cursed negative number as output. The error message is peak comedy: "If it is not working, you might have typed something bad and the app doesn't want to take the input" – translation: "I have no idea what's happening under the hood and I'm blaming YOU for it." Classic junior dev energy. Using eval() on user input is basically handing attackers the keys to your kingdom and saying "please be nice." It's the security equivalent of leaving your front door open with a sign that says "robbers welcome, valuables upstairs." But hey, at least they learned this lesson early before deploying it to production... right?