I think it would be acceptable to support emojis, but set the font to use the black/white ones rather than colour. That removes most of the distraction.

At present, this can be done by following any emoji character with the text variant selector, U+FE0E [1] (the example works perfectly on Firefox on KDE).

Later, it will be possible with CSS [2].

[1] https://mts.io/2015/04/21/unicode-symbol-render-text-emoji/

[2] https://drafts.csswg.org/css-fonts-4/#font-variant-emoji-pro...

Lets just use punycode, it can be the new l33t xn--g28h