Well, at least then you could think of the addons as local slang. It's still unnecessary, but limited to the social circle at your workplace.

I didn't have a huge beef with the proprietary emojis on old skool Skype and MSN, TBH - they were technically bound to those platforms, and the platforms mostly to private social spheres where they'd form part of the local slang. (And where Skype was used at work in the 00's, people actually refrained from them and acted in a businesslike manner).

Modern day emojis being part of unicode implies that they're somehow universally understood, and that it's fine to sprinkle them around in any kind of social context. Quite horrifying, really.