But that means you have a situation where you can find images that don't contain the thing you searched for. Searching big_breasts can find thousands of images that don't actually contain big_breasts. For example, searching big_breasts solo gives you images like example 1 in my previous post, clearly too big to just be considered big and clearly not what was searched for, and you shouldn't have to put in extra effort to exclude things that shouldn't be able to show up in the first place.

What if someone wants the big breasts tag to behave like it's supposed to, ie. find all images containing big breasts with or without other sizes present and ignore images that don't have any big_breasts present. Should they have go to the extraordinary effort of setting up an overly-complicated blacklist just to make a tag function properly (and still end up with unwanted results)?