[Harmless Teddy Bear]

I am worried everyone might end up hiding in the woods all weekend."

I am not going near the woods if there are clowns in the area.

[Graymatter]

If a person's in a costume and it isn't Halloween (or even if it is), he could be a clown. Who's to say? At any moment he could pull off his mask and, yikes! it's a clown.
Therefore no matter how they're dressed, I'm leery.