Depending on what went into the costume, it may fit into a maker fare (ie, 3d printing parts of the costume, for example). I don't mind cosplayers all that much, they're generally fairly nice people.
One thing that has historically put me off about the maker community is these artificial distinctions where materials and ways of making things that have historically been considered "girl stuff" get less respect, or sometimes don't even get recognized as making at all.