The above description would fit many many circumstances that are not furry related or problematic at all. Saying "I'm a cat. no, really" or meowing or licking your hand would all fit that description, (except not really because the word anthropomorphic is used wrong), but don't mean a person is a furry. Moreover these behaviors by themselves don't cause any problems unless you imagine a bunch of other stuff that's not included in this definition.

So it is an overbroad law that allows prosecutors to apply it selectively and at the same time is very hard to defend against.

A better definition for the purpose of the law would describe some behavior that actually causes damage to society, like disrupting class or arresting kids at school for saying they are a cat.

A better definition of a furry would probably include some kind of pattern of behavior and the extent to which it impacts daily life, as here