I didn't read the whole thread, so maybe it's been covered, so my apologies if so. The Bak'u had about 300 Renaissance Festival villagers, and the Son'a probably even less, so why not just have the Son'a settle somewhere else on the planet and open up and lodge and spa for Federation people to absorb the radiation or whatever it's magical powers were? It makes more sense, and would probably be more effective than bottling the stuff.
Best idea ever!
And if the Sona are too far gone - well that's their own problem isn't it.
Maybe this time I agree with the PD in not interfering with internal politics of a planet.
If people say go to the planet, will they turn Sona like if they leave? I know Picard and his crew didn't but if they stay for an extended time?