Just because a character is holding something and a weapon is in the image, doesn't mean they are holding_weapon. (post #305736 , post #305465 etc.)
We already have tags for dual_wielding, triple_wielding and quadruple_wielding, yet no tag for single_wielding. (Can't really think of a better tag to describe this..)
Might also be worth implicating all four tags to holding.
Not weapon due to the issue mentioned in http://danbooru.donmai.us/forum/show/59335
There are some issues on this. While it does say they're for weapons, there have been some non-weapons also using the wielding tags. Particularly dual_wielding fan. It should be noted that it isn't uncommon for some fans to be used as weapons, but that doesn't mean they should be tagged as a such.
Personally I do not think any of the wielding tags or even the gangsta_hold tag should implicate the weapon tag. I think there is room in all of them for non-weapons to end up under these tags and as such should not implicate the weapon tag.
Since each wiki page says "wielding * weapons", it may be worth having a seperate tag for non-weapons or editting the wiki to clarify that it can be *_wielding other items.
Updated by Shinjidude