As much as I think the essay is great, this paragraph is a terrible ad-hominem argument for the existence of a "cult of science" or why it is dangerous. It doesn't matter if people wear xkcd shirts, Matt Damon uses profanity with "science", or if people like a facebook page. Laypeople having fun with "science" does not make a cult. A better argument would be to show how people cargo-cult science, and why it causes problems with science. The author fails to do both.
IFL is dangerous not because it is only pictures of scientific phenomena, but that bullshit is constantly posted on the page to be consumed by laypeople. The cult of science is dangerous because it has failed to teach people how to properly evaluate claims, and believe anything with the word "study" in it. Woo-pushers have appropriated the vocabulary of science indistinguishable to a layperson. Andrew Wakefield resurrected long dead pandemics by falsely publishing in the Lancet. This is what makes the cult of science dangerous, not the word "bitches".