Worst: Scarecrow (Batman: The Animated Series)

Voiced by: Henry Polic II 

Let's get this straight: the Scarecrow's aim is to strike fear into all who cross his path, so he dresses up in... straw hair, a farmer hat, and a cheap burlap mask? Thankfully he has fear gas, otherwise he'd have to rely on fits of laughter to distract people while he robs banks and stuff.