Yeah, I don't see MDRF doing this. Rennies fairly frequently come up with similar ideas, and it never happens. The faire has fairly strict policies about their cast, who gets in, and what they get paid. Sir Barchan is the only jouster that gets paid extra to walk around and interact, and most of us are out of period (early 16th century) anyway.
This sort of idea would more easily pass at some of the other faires that aren't as strict about historical accuracy and actor's remuneration and the like. For instance, some of the CA faires are pretty loose and run almost entirely by various guilds.
But this also ties back into one of my desires for the faire circuit-- I want to see more medieval faires, and less emphasis specifically on the renaissance. Most danes don't get the difference anyway, and it would be nice to see more of the relevant history portrayed as well. Most of the jousting troupes seem to do more of a 14th century look (including Medieval Times, but excluding MDRF's Freelancers), since that was the height of the color and pageantry. The unwashed masses would love medieval faires just as much.