Even at 12 I could tell this guy was an annoying idiot. Loved the comic though.
Which is why it's so important for people understand the Principle of Parsimony (aka. Occams Razor), and Russels Teapot.
Also, refuting it is rather easy, and doesn't even require modern technology, Henry Cavendish performed the experiment in 1797 [1]. Nothing in the experimental setup would change if all involved objects expanded.