[al_f]

I suppose the real question is why OF lets actions with no assigned context out of the inbox at all. Not sure why that design decision was made, to be honest.

However, even if it does, that doesn't stop you assigning a context to everything as you process it. So, having an "unassigned" context is not really a problem is it? If you're rigorous with your workflow it'll never be needed, but it's there as a safety net if it is (e.g. if you absentmindedly hit "clean up" by mistake when you haven't finished processing a particular action).