It'll kill them, but not because it's acidic. Insects breathe through openings in their abdomens called spiracles. They'll slowly suffocate if the spiracles are blocked, like from being submerged.

Yea I guess I'm one of the few that hate to see even bugs suffer.

Are most insects (and shrimp for that matter) actually able to feel? I mostly heard they are best described as automatons, like low-level robots made by nature. My roomba might have higher "brain" function than a cicada, but I don't know about newer studies.

Have you heard the sounds these make? They don't care if you suffer.

Yes, good point, but what worries me more is that the bullet point is missing where it says to gut the corpses and remove the cicada intestines and poop. Surely that's standard when eating... anything really. Make it poop-free?