Creating a symbol umbrella tag?

I noticed we have several symbol related tags, such as biohazard_symbol and radiation_symbol. I'd think just having a tag for symbols might be useful.

That seems incredibly vague and useless, like a clothing tag.

A tag group is probably the most needed, if even that.

There's already the Tag Group:Symbols section with a gradually growing list of everyday symbols and shapes, plus symbols seen in certain series. I find that using symbol is as subjective as cute, creepy and ugly.

It's not subjective at all. It's just applicable to so many different things as to be completely useless for finding any particular image, which is a tag's purpose.