Lowering the voting age: what's the worst that could happen - Marcus Lush Nights

Golriz Ghahraman’s Electoral (Strengthening Democracy) Amendment Bill was pulled from the biscuit tin a couple of weeks ago, with a proposal (among other things) to lower the voting age to 16.
It gets brought up from time to time, but no one has really been able to answer: what's the worst that would happen if we did it?
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