Forensic experts cover themselves completely, including a face mask and hood, so they don't pollute a scene. They're not there in full glam.

No, there isn't an alert for when your computer system is under an attack. It would go off constantly because every script kiddie is trying an attack 24/7. There also isn't an alert for when the firewall is penetrated because the whole point of the penetration is that you wouldn't detect it and they can quietly steal data.

Stealing gold instead? It weighs a lot. That gold bar you're casually carrying between your finger tips actually weights as much as a reasonable big dumbbell. (16 oz bottle / half liter of gold weights very roughly as much as 2.5 gallon / 10 liter of water or 20 pound / 10 kg)

And every time people are casually thrown into walls. Meanwhile people go to the hospital after a bit of a bad fall when cleaning the gutter.