[curryst]

We don't have to argue about it, you can look at the Wisconsin law for it.

> “Dangerous weapon" means any firearm, whether loaded or unloaded; any device designed as a weapon and capable of producing death or great bodily harm; any ligature or other instrumentality used on the throat, neck, nose, or mouth of another person to impede, partially or completely, breathing or circulation of blood; any electric weapon, as defined in s. 941.295 (1c) (a); or any other device or instrumentality which, in the manner it is used or intended to be used, is calculated or likely to produce death or great bodily harm.

I would say a skateboard, wielded as a weapon, is likely to produce death or great bodily harm. Getting hit in the head with a skateboard even once seems likely to cause a concussion or maybe even internal bleeding.

You probably do have a good number of items that could be classified as deadly weapons on your desk, depending on how they were used.