1. impossible to get a fingerprint out of a shattered bullet...just plain stupid? mmmm well...just because you can't imagine how it could be done doesn't make it impossible. Cellular phones make "impossible" predictions on voice patterns like that every second of every minute of every hour of every day in every cell network in the world, impossible? I say maybe a stretch, but not impossible. CSI? you don't like it? well then do some research as to what can be done with computers these days, starting with fan edits.

2. You don't like it because it's weird? that's moot. The spreading of the software to all cellphones in gotham is a much more powerfull argument, Over The Air systems do exist, the download programs to cell phones, sometimes with the subscriber not even knowing it, again, a stretch? maybe. The Joker point you make would be a valid one were it not for the fact that the Joker has a cell phone, you see him using it during the burning of cash scene and to get commands to his henchmen. That Sonar technology is impossible and that annoys you? good thing we have Tumblers strolling around everywhere and they all come with their ejec-a-pod bike inside right? and that doesn't annoy you because it is soooooooo real.

3. He doesn't have a voice changer? and you KNOW that for fact because you wrote the script right?