Some people have been suggesting that you should spoil your vote as a protest in the upcoming presidential election, but they may not realise that this will result in a guaranteed win for the reserved candidate.
Here's a strategy that can kill two birds with one stone (provided there's no walkover):
First, we have to decide who is the strongest alternative to the puppet.
On polling day, write Tan Cheng Bock's name in the box next to the strongest alternative on the voting slip. (Or anywhere along that row as long as it doesn't cross over to the other candidate's space.)
Under election rules, the vote will count towards the strongest alternative even though it's not properly marked.
So there you have it. You can technically have your cake and eat it. Yes, it might not change anything but at least you have shown your middle finger to the #PartyAgainstPeople.