On Fri, Mar 02, 2018 at 07:59:05PM +0000, Mark Svancarek via UA-discuss wrote:

Yep, you would need LGRs, rules about colors, accessibility technologies, etc. 

Except that you can't make such rules because they're not controlled
by the sending side (i.e. they're not all actually properties of the
code point as such), and because normalisation doesn't work.  I think
we've explored this rathole before, however, so I don't think it needs
another full airing :)

A

Those facts, however, are not clear by people equating emoji with a picture of a heart.

A./