using an apostrophe to indicate possession is the common case.

For nouns, but not pronouns. Compare his, her, my, their, ...

As for comics, perhas I should not admit to liking this one.

The objection that it's not a procedural knowledge gap is probably valid. But I was not just ranting; I asked a number of questions in the answers to which I am genuinely interested. And whether I feel superior to people who use apostrophes incorrectly does not strike me as relevant--although I try not to, and understanding why they do it might help.