Clawdragons said:
Not exactly.

Well, first off, if you treat them as one tag that has to be included, suddenly a lot of search slots are taken up. In your example, four tags would be used, using very little for whatever actual searches would normally be going on. I think limiting it to one or two is more reasonable.

I assumed that the tool was doing its own filtering to a certain extent, and thus was not subject to that kind of limit.

For example, doing only the searches involving tags that are not 'special' in the way you describe.