Kooky "reaction GIFs" in work chat are so inane. I mean, there's certainly a time and a place for browsing funny GIFs on the web, but making it a first-class part of work chat is so juvenile it's unreal.
Once we have some sensible way, then clients can sensibly opt to pop a dialog for new users allowing them to register an account with nickserv without having to fiddle away in a query.
Unless you regard it as inane.
Throwing reaction gifs at a happy birthday/congratulation post is one thing.
Throwing them into the oncall production ops channel and context switch everyone so they can see Homer back into a hedge is another.
This is part of the reason I like the "reactji" of slack / discord / etc. They don't cause a new message notification.
Because of that, they're less interruptive, and you can do some interesting, useful things. Like lightweight interaction - we "seed" an up/down arrow pair for voting, people just click one. Or controlling bots more easily - we use one to add Qs to a queue, others to shut them up when they're being noisy, or there's fancier options: https://codeascraft.com/2018/10/10/etsys-experiment-with-imm...
Humor is subjective. All you have to do is reference "Office Space"'s "looks like somebody has a case of the Monday's!" scene to realize she thought it was funny, the "someone" did not.