I pasted this into another thread but it is worth repeating here.

Echoing the rather arcane language of the legislation, "idiots" may not vote and "lunatics" only during their lucid periods. Those compulsorily detained in psychiatric hospitals, for example, cannot vote.

I have never, until now, suggested that anyone should be refused a vote but in light of the obvious fact that 'lucid moments' are beyond it, I would make an exception here.