It’s gone. The ACLU itself is pretty anti free speech these days and happily looks the other way when censorship on private social media platforms aligns with their ideological views. People have been writing about free speech issues at the ACLU for about a decade now:
https://www.tabletmag.com/sections/news/articles/is-the-aclu...
You've got me thinking. I'm sure there's government pressure on social media to not carry certain posts, or allow certain human access. That's a pretty clear 1st Amendment violation. But it shades off. What about say, NSA using it's total information awareness feed of the entire internet to let HN know when a terms-of-service violation happened. Is that OK? What about if the NSA selectively notifies Truth Social of TOS violations? What if the NSA sends an official lawyer around to Facebook to get them to modify TOS a particular way? What if the DoJ sends someone to Paul, Weiss to get them to send someone else around (pro bono!) to hint that modifying TOS a particular way would be beneficial to Bluesky? What if Zuckerberg calls up Trump and asks him how he'd like TOS to read? I'm not sure where the line is.
The line is always where a criminal violation seems likely to occur, including criminal negligence. Otherwise the government has no business butting in, unless subpoenaed as a witness by a court in a civil matter.
Edit: I guess the government also has a right to respond if it, or its policies, are a target of criticism or lies. But it should do this in the court of public opinion, or in an actual court if said speech breaches criminal law or a civil tort. Though in the latter cases it would be held to the highest standard. It has no right to otherwise shut down anyone's speech regardless of where it occurs.