One of the core features is that there are no "operators" .. that is the very purpose of decentralised open protocol designs.

Filtering to ignore the posts and people and organisations that provide you no information or value is a simple method. Cultivating those that you follow or interact with carefully is a very close second.

No level of censorship - which is ultimately what you're talking about - is possible without centralised control. One of your countrymen wrote a novel about that dystopian future scenario which is probably a good primer read.

So a question for you:

 .. on what basis do you decide what is "acceptable"? 

 Make Ideologies Great Again!