Make sure you don't have add-ons like this enabled on any webpage you plan on inputting text, as depending on how the text input is implemented, you may have your words swapped without realizing it. But if those substitutions are appealing to you, then by all means use the add-on.
The Discord portion of the "Microslop" story was just one of many knock-on effects of the outrage about Microsoft in general lately. E.g. this extension was last updated a month ago and there were discussions and articles before that about "Microslop" catching on in social media as early as a month before that https://news.ycombinator.com/item?id=46490908
It doesn't help Nadella has been pressing to move things beyond calling AI output "slop" either.
Microsoft has always been awful for about two decades now. I'm just not particularly moved by a company policing their own niche Discord servers. Although if this is what gets people to finally stop using Microsoft products then maybe it's a good thing.
The outrage isn't about Microsoft continuing their general awfulness or what they did on their Discord server, it's about the consistently extremely poor AI (slop) pushes in all of their products.
I doubt this is what will actually break the camel's back - but who knows :).
Fair enough, I don't really follow Microsoft. I just see everyone use -slop for everything mildly bad in culture so I don't associate it with AI anymore.
"Cloud to Butt" was the peak of these for me because it offered a genuine reusable joke (things like "Butt Management Portal", "Butt usage up 25% YoY", etc) rather than a one-off humorous name calling.