I generally agree with everything you've written there; however, as a minor nitpick, those skin tone modifiers can be printed in isolation. I'm not sure how this will render on different browsers, but on my terminal: 

$ perl -C -E '
    say for
        "\N{U+1F3FB}",
        "\N{U+1F3FC}",
        "\N{U+1F3FD}",
        "\N{U+1F3FE}",
        "\N{U+1F3FF}"
'
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And, in a preview, that looks fine on my Firefox v100.0.2 — YMMV.

— Ken

In reply to Re^4: Capture a non-printable char and test what it is by kcott
in thread Capture a non-printable char and test what it is by almsdealer

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