In baseball, if you fly out, do you later say that you flied out or flew out?
Language rules are complex enough that I try to give people the benefit of the doubt before I assume they're misspelling or using incorrect grammar. The whole British/American thing has to be allowed for, of course, though usage should be consistent one way or the other. Plurals and singulars are generally no-brainers for me, but there are exceptions, like "news" and "data". I have to make a conscious effort with those. Some things bug me. In particular the confusion with "its" and "it's". The first is the possessive pronoun,
always. The second is the contraction for "it is",
always. I see these misused constantly, even in otherwise literate publications.
And that last usage of quotes shows something which runs contrary to what I've been taught. Periods and commas at the end of a quotation should always precede the quotation mark. Bullshit. Punctuation should go where it makes sense. If it's part of the quotation, it should be inside it. Otherwise not. This is the rule for question marks and exclamations. Why not periods and commas, aesthetics? Thus, I rebel.