Undertaker.: I think the best solution is to implement better search options, rather than restricting the tournament creators. For example, a search for a specific game type should give you a list of only the relevant sections of each tournament (rather than the current list of tournaments, where you have to click each one and look for your preferred game). That way, you could compare your options more easily. Add to this an option to search for those tournament sections that only need a few players, and I think the problem is more or less solved.

The real problem is not all the empty tournament sections, the real problem is that we can't get rid of them in the search.