I for one do not like to have certain hashtags. As I am offended by the #stop stealing. It makes me feel like I am being accused and I have not done anything so basically anything in the gallery with that hashtag I do not put it in my game sort of like the NIKE thing going on now. Hey I am older I find those kinds of things offensive. Now if the hashtags are helpful then yes, they can be used to search quicker. But the ones that are not descriptive are to me just offensive. The gallery is for sharing not making accusations that you are stealing. It all belongs to EA anyway. Other times when I do download from the gallery I go in and favorite all the creators items, and look for their creations when I need something in my game. Hastags that do not inform to me are just useless.
I do not use the hashtag when searching very much.