[Blood of Tyrants]

Well, if there were a store policy against carrying guns into stores, there obviously wouldn’t be any armed robberies. The crooks would see the sign and walk away disappointed.

[Slainte]

Seems that what’s really needed are signs at the bank entrance saying “Don’t rob banks.” Problem solved.

[Sir Napsalot]

Thanks to those who tried to teach me MDA logic -

This is a catch-all Brain Free sign.

[Oatka]

The crooks would see the sign and walk away disappointed.

That's a proven fact. /s