Generally, I think danbo tends to lean a bit to the ridiculous at times but I don't mind tags like 2girls, 3girls, etc. I think it may be the only practical way to search for 2+ girl images without knowing specific model/character names.

On the other hand, I'm against "tag clutter" like positional tags. That being said, we are approaching the 300k mark so I'm open to discussion on additional tagging organization as long as it doesn't devolve into a spergfest.