Nicer formatting for emote events?

At the moment if someone "emotes" (`/me does a thing` in IRC and in Element; `s e` in Ement.el), the message face is different, but the formatting is the same as for normal messages.

Traditionally a message of `foo` would be rendered something like `: foo` while `/me does a thing` would be rendered as ` does a thing`.

The current ement.el rendering of the latter is more like `: does a thing` which is confusing.

Should there be a separate message format for emote events?

(Is that the only event type where a separate format would be useful, or are there others cases besides this one?)