The FBI contacted trust and safety and said 'Hey we have concerns about these tweets'. Twitter decided to take them down in some cases.
Who is corrupted here? Twitter for taking reports and then deciding how to react to them? The FBI for finding misinformation that might lead to crazies creating mass casualty events?
The FBI at no time FORCED twitter to do anything. So it's not violating the first amendment.
All these installments have done is confirm over-and-over again that this was pretty much the normal and expected kind of interaction.
I’m not sure how institutions can say “no” to the FBI without feeling fear of retribution, nor do I want the FBI putting pressure on corporations to be something that’s “normal and expected”.
I'm sure there was some give-and-take but on the whole what I've seen so far is absolutely par for the course, if you were to look into Facebook, Google, Microsoft and any of the ISPs and email providers you would find the exact same thing.
Both Twitter and the FBI were pretty open about the FBI having limited access to Twitters' firehose and that there was constant interaction between the two parties. You can add to that that if you were to look at this internationally and at the state level that such contacts can be expected to exist as well. Any assumption to the contrary is hopelessly naive.