This.

Not the worst but almost all of us (including me) handle strings like fucking morons.

If the input doesn't need to be an exact match we use a explicit comparison operator, when the input should explicitly match we do a loose comparison operator.

I'll format the crap out of a number, convert it, validate decimal places, check for float rounding hell, give it a absolute value and return it correctly formatted for the users locale but half the time I forget to trim their input. 🤦‍♂

Like I said - just a tad fucking moronic isn't it?