Because inhaling helium makes your voice squeaky. I’m assuming that inhaling Helium-3 would do the same thing. 8)

Kangaroo court more likely. I love the conflict in the peanut gallery.

Extra points for Calvert du Quesnay.

Great, funny interplay and well observed continuity with the earlier series. I’d assumed ‘squeaker’ implied an insignificant upstart, like ‘pipsqueak’ – your explanation clarifies, but I think its nicely suggestive in any case.