BruceS:
If this is the intent then make it so that I can post them in this holding place and when the category is created only I can submit it... The current implementation only foster disharmony when someone "poaches" a waymark I have put in the holding area waiting for a category.
The unfinished waymark feature provides this already. You can either publish it to uncategorized waymarks or keep it unfinished until the category is available. If you were to, say, play it by your own rules, you could identify the category yourself and finish your waymark once the category is available.