@RE: make a point, make your vote invalid
Sure, if you spoil you ballot paper you're portrayed as too stupid to vote/content with your lot.
But if massive numbers spoil their papers, that starts to show up in statistics.
Even better, if massive numbers spoil their paper in exactly the same way, say by affixing a colourful, highly visible sticker to their paper, that would be hard to pass off as an act of thickism and would also be visible enough to start being noticed at count footage on tele.
Penguin, cos i'd vote for an Antarctic seabird over any of the current tw@s.