Twitter as a private company can moderate content as it sees fit. But the government is supposed to be constrained by the First Amendment. And here, they technically are, because they're not forcing Twitter to take action. But there's always the background threat of regulation if Twitter doesn't play nice, so it's not as black and white as this.
Having been on the receiving end of such requests I was pretty happy all of them were made in a confidential manner, it saved everybody a ton of headaches and reduce the amount of grip the various miscreants had on our community. Doing that in the open would have caused massive issues, some of these people were downright dangerous and others simply needed help, keeping their data and our interaction around that data confidential was - in my opinion - a good thing all around.
You would have to decide on a case-by-case basis which requests can cause harm and which don't, which given the volume of such requests would add a fairly unreasonable burden on a company that was already cash strapped.
The only reason people want to know about this stuff is some kind of morbid curiosity. What you could do is to come up with a set of workable rules for which requests would have to be made public and which not, but I don't think I would be capable of coming up with such a set of rules that would not in the future lead to issues. So to default to secrecy seems prudent.
In that light, the sale of Twitter and the subsequent exposure of all these interactions presumably has the effect of such communications becoming more opaque rather than less resulting in the opposite effect of what you desire.
Nobody has a problem with the FBI doing takedown requests for that kind of content. It's about political content (labelled "civic misinformation") on accounts like @RSBNetwork. The FBI isn't supposed to be taking sides and potentially influencing elections by encouraging social media companies to ban accounts of political actors.
Personally I'm of two minds about this whole thing. While I have concerns, the right-wing in the US at the moment are an authoritarian movement and social media companies are doing not nearly enough in the way of moderation. Ideally the FBI would have stayed out of it and Twitter would have upped their game.
> You would have to decide on a case-by-case basis which requests can cause harm and which don't, which given the volume of such requests would add a fairly unreasonable burden on a company that was already cash strapped.
I'd put the burden on the FBI. If they want to exclude all clearly non-political content (e.g. suicide videos) from the transparency report that's ok by me.