I agree with you about the union(s); I agree with tlm on the Heap name. Just thinking about some Monks playing with a heap of leaves, jumping inside them just for fun before firing them to clean up - something that maybe really happened in some meatspace monastery :)

I'd also prepend "Obfu: " to the title of each node that got moved from Obfu to Entertainments and prepend "Poem: " to the title of each node that got moved form Poerty to Entertainments and document that such categorization in titles is encouraged and note that existing categories include "Golf:" and "Quiz:" etc.

This poster-driven categorisation will be very, very difficult to obtain. Having good titles here seems rare, and you're asking posters to be even more responsible. Maybe you could go with a group of radio-buttons that the poster can use to sub-categorise the matter.