Honestly, I was rewatching 'The Dark Knight' last weekend and got stuck on this one part. Batman builds this crazy sonar system that lets him see every phone in Gotham, but Joker just walks into the bank in the opening scene wearing a plain clown mask. How come Bruce couldn't just scan for clown masks across the city using that tech? It feels like a total oversight. Has anyone else wondered why he didn't just cross-reference mask purchases with known hideouts or something?