Title appears to be clickbait. The original AP story [1] says this restriction applies to the agency's social media accounts. It does not say this restriction applies to employee's personal social media accounts, as thehill.com implies. This is the relevant section from the AP article:
> Emails sent to EPA staff and reviewed by The Associated Press also detailed specific prohibitions banning press releases, blog updates or posts to the agency's social media accounts.
Judging from other comments, a lot of people did not interpret it as you did. People are asking if this is a 1st amendment violation and if this is censorship.
Agreed, but those same people are also likely to mistake an employer's banning of employees tweeting under the company name as also an infringement of the 1st amendment.
> Emails sent to EPA staff and reviewed by The Associated Press also detailed specific prohibitions banning press releases, blog updates or posts to the agency's social media accounts.
[1] https://www.apnews.com/5ada25fc57b44a0989e681d6dc2a3daf/Trum...