On the other hand, "Hands up, I have a note!" probably wouldn't be very effective:
A Richmond Police lieutenant investigating a bank robbery on the city's north end said Wednesday he was surprised the suspect used a gun.
[. . .]
Berner said the suspect's decision to use a semi-automatic handgun surprised him given the area's recent history of bank robberies.
In 2007, notes were used in robbing three Richmond banks. Police have said that using a note does not attract attention and lowers the robber's profile.
Maybe we should outlaw notes. No, wait . . .