Thistles may not grow in one’s yard.
Baltimore

No person who is a “tramp” or “vagrant” shall loiter in any park at any time. They define tramp as a person who roves for begging purposes and a vagrant as an idle person who is able-bodied living without labor. It’s a $50 fine. I guess the tramp would have to beg for the money to pay the fine. -Park Rule 6

It’s illegal to take a lion to the movies.

It’s illegal to throw bales of hay from a second-story window within the city limits.

It is a violation of city code to sell chicks or ducklings to a minor within 1 week of the Easter holiday.

It is a park rule violation to be in a public park with a sleeveless shirt. $10 fine. This would include joggers that go shirtless. (1898)

Baltimore City
You may not curse inside the city limits.

Though you may spit on a city roadway, spitting on city sidewalks is prohibited.

Columbia
Though clotheslines are banned, clothes may be draped over a fence.

You can not have a antenna exposed outside of your house yet you can have a 25′ satellite dish.

Ocean City
Eating while swimming in the ocean is prohibited.

A law from the early 1900′s prohibits men from going topless on the Boardwalk. (Repealed)