The idiocy of the "Political Correctness Police" knows no bounds, and is bound by no requirement for intelligent reasoning or application of facts to be located in any reality outside their own fractured minds.
Case in point: Does anyone truly believe that a sign stating "No weapons allowed!" with actiually stop a criminal intending on robbing,raping, and general law-breaking with a weapon? Will it stop a madman refusing to take his medications from his demented attempt to slaughter as many defenseless men, women and children as possible in the least amount of time?
If you believe such signs work, you are too intellectually dishonest, or simply lacking in intelligence completely, to be wasting time on. You probably vote Democrat.