When your code review buddy asks if buffer size 500 is enough and you respond with the confidence of someone who has absolutely no idea what they're doing. Will it handle the data? Probably. Will it cause a buffer overflow and crash production at 2 PM on a Friday? Also probably. But hey, 500 sounds like a nice round number, right? It's bigger than 100 but not as scary as 1000. The scientific method at its finest.

Using toLowerCase() or toUpperCase() in your conditional logic? That's some big brain energy right there. Most devs just slap these methods on strings for case-insensitive comparisons without a second thought, but the real ones know this is a minefield of locale-specific chaos waiting to explode. The Turkish İ problem is legendary: in Turkish locale, the uppercase of 'i' is 'İ' (with a dot), not 'I', and lowercase 'I' becomes 'ı' (without a dot). So your innocent if (userInput.toLowerCase() === "admin") suddenly breaks when deployed in Turkey. There's also the German ß that uppercases to "SS", and Greek sigma has different lowercase forms depending on position. Unicode is wild, and these methods respect locale by default in some languages. Pro tip: use toLocaleUpperCase() or toLocaleLowerCase() when you actually care about proper linguistic handling, or better yet, use case-insensitive comparison methods that don't mutate strings. The lion knows what's up.