Don't forget the rules of British English that make it very clear that the grammatical construction: "you should consider" means "you must in all circumstances save for the immediate alternate outcome being a genocide."
https://polish2english.files.wordpress.com/2011/11/55551980-...
I'm afraid I don't know what RFC English is and neither does Google.
SHOULD This word, or the adjective "RECOMMENDED", mean that there
may exist valid reasons in particular circumstances to ignore a
particular item, but the full implications must be understood and
carefully weighed before choosing a different course.
It means you can’t simply ignore it, and instead have to have compelling reasons to justify any deviation.