They do, and some will absolutely do (to some it is important to "assess" language) - it really depends on what you mean with "people" (of course I meant a subset).
What happened there is, in the succession of editings I left that 'people' there in a way that happened to be ambiguous. I made a composition error out of inattention.
No. It is not a matter of being «native». It may be your mothertongue of not: it is an approach transversal to all (this class of) languages.
It is the set of those people who intend to speak English, though surely not the language in use among the English. "Currently typical" English does not mean "good" English.
Edit:
On the contrary, «native English speakers» are the one who will follow that: they are the ones supposed to have absorbed more English (and relevant) literature.
I have just checked and I see the terms employed correctly in Joyce, in Wilde, in Chandler, in Hammett, in Paul Johnson, in Niall Ferguson, in Woody Allen, in Spike Milligan.
As absolutely expected: there is the gathering of the Assessors.
What happened there is, in the succession of editings I left that 'people' there in a way that happened to be ambiguous. I made a composition error out of inattention.