If you can't see how this would be a bad idea, let me introduce you to the biker bar analogy.

Let's say you own a bar. Business is good, you get a variety of customers, but they're all pretty average people who are just there to drink and chill. Then, one day, a gang of bikers shows up to your bar, and starts getting rowdy and unpleasant. They pay for their drinks just like everyone else, but eventually, their presence starts annoying the regular patrons, and over time, more of them stop showing up. You essentially have two choices as the bar owner, now: You either kick out the biker gang and resume business as usual, or you accept that you run a biker bar, because those are the only people who go there now.

If you open a server (or really, any space on the internet as history has shown) where the big draw is "You can say whatever you want without being punished!", then you're eventually going to see that place devolve into only having the worst, most insufferable kind of people that aren't welcome anywhere else. Such a server would get incredibly toxic, and if you let it fester, you'd quickly start to see people from that server become a real nuisance in any cross-server content.