I'd say the proportion is actually something like 1:1000, meaning 1 danger hair isn't crazy. So I totally can judge people based on looks, estereotypes exist for a reason, it's shortcuts our brains take to make decisions.
Yeah, well, if you decide 999/1000 danger hairs are crazy, then you will stop talking with them and so you will never know. That's the definition of prejudice.
It's the same as someone saying "He had an American flag on his pickup truck, so I knew he was a white supremacist." We all know that's ridiculous, but it cuts both ways.
Unless you're repeatedly getting screwed over by danger hairs (in real life, not Twitter), you're operating on prejudice. Which is fine if that's how you want to be.
Actions are important, not looks.
You see coming towards you a group of say 5 young guys, tanktops, pants below their asses, tatoos all over, you immediatilly assume what?
I clutch my pearls? I dunno, man. I assume they're going to be loud jackasses, but probably just regular dudes.
If you're facing threat of violence, then it's smart to avoid people who look violent. Prejudice and stereotype can save your life, absolutely.
But we are talking about elf games, man. Context and perspective.