Integrate Folksonomy into Collecting Form

This is a weird and possibly fantastical wishlist item, thought I’d see if anyone has a sense of how to implement. Our site has a front-facing Collecting Form where volunteers can enter new items, they aren’t made public on entry but sit until reviewed by back-end editors prior to publication. I would like volunteers to be able to add Folksonomy tags directly through this form. I can get partway by setting a prompt for the Item Property ‘Tags’, but can’t find a way to hook the list of tags directly as an input type. Is there a method, scripting or otherwise, that anyone can think of to directly link the Folksonomy list to a collecting form?