What do you think of this as an idea for a play?

Yes, I think the trick here is to figure out the arguments on both sides, and then apply what is relevant to each character. I actually wrote a monologue years ago on someone who still believes the earth is flat: it's quite tricky to write from that point of view (well, someone else's POV) without either making it sound over the top, unrealistic, or poking fun/being abusive. I guess for me making the character seem 'normal' or at least making the audience believe that there might be something to the theory is to put a human face on it. Whilst the ideas themselves may sound silly (and many of them are, since there's no evidence behind them), there are people who legitimately believe them to be true; whether it be in the form of pure faith, or from anecdotal experiences from friends and family, to believing 'trusted' or 'well-respected' authority figures. (Case in point: people believing that condoms don't work because the Pope says so. Which of course isn't scientifically true) I'm not sure if my point is clear, but I hope it makes sense on some level. Puppets and patterns at Puppets in Melbourne