to-vote-or-not-to-vote
Explanation
The Joke
The comic presents a debate about voting. The first panel makes the common argument that voting is a mistake because a single vote is unlikely to change the outcome of an election, so it is a waste of time. The second panel counters with the equally common argument that even if your individual vote is unlikely to be decisive, you should still vote because it costs very little time.
The third panel introduces a twist: statistically, "you have a tweedy [academic] type of non-voter" who spends at least two months of their life composing arguments on social media about why they don't vote. And then the fourth panel delivers the punchline -- these supposed non-voters have "strong opinions on voting megaphones" and spend enormous energy telling everyone about their decision not to vote. The person observing this asks the real question: "They are the worst, right?"
The Humor
The comic skewers a very specific type of person: the vocal non-voter who spends far more time and energy explaining and defending their decision not to vote than voting would ever require. The irony is layered -- they claim voting is a waste of time, yet invest vastly more time performing their non-participation than voting takes. The comic side-steps the actual political question of whether voting matters and instead targets the performative aspect of loudly announcing one's abstention. The phrase "voting megaphones" captures the absurdity perfectly: people who won't spend fifteen minutes at a polling place but will spend months broadcasting their principled refusal to do so.