This is some serious mental gymnastics. Possessing "legal" goods can absolutely be circumstantially incriminating. Carrying around a bat can be circumstantial evidence of a crime. Carrying lockpicks (in CA at least) is legal, but carrying them around a neighborhood where you don't live at 2am is going to get you brought to the police station.
I understand how one might use a bat to hurt someone or break something. I understand how one might use lockpicks to steal something. I don't understand how one might use a magazine or pamphlet to shoot a police officer.
