Who's going to prosecute them? In our new fascist state where certain firms friendly to the government are given lots of latitude and preference and others are crushed, Twitter in one of the ones on the 'in'. They have absolutely nothing to fear no matter what they do.
“I thought tweets from an official government account could not be deleted, as they are part of the Federal record?”
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https://www.whitehouse.gov/privacy-policy/
“ON TWITTER, THE WHITE HOUSE AUTOMATICALLY ARCHIVES “TWEETS” FROM OFFICIAL WHITE HOUSE ACCOUNTS, AND MAY CAPTURE “MENTIONS” (TWEETS FROM OTHER USERS TO OFFICIAL WHITE HOUSE ACCOUNTS; THESE TWEETS CONTAIN AN @ AND THE USERNAME OF AN OFFICIAL WHITE HOUSE ACCOUNT (E.G., @WHITEHOUSE).”