On 16th December 2022, Isaac Schorr wrote an opinion piece for the mediaite side called Hypocrisy and Fear All the Way Down at Twitter in which he described the recent decisions from twitter to block multiple accounts.
On of the accounts he blocked was @joinmastodon which Schorr has red as "John Mastodon".

Before this latest wave of suspensions, Twitter had already suspended the account posting the location of Musk’s jet. Then, the platform removed John Mastodon, the founder of a competing social media company named after himself, for posting a link to the jet tracker’s Mastodon account.

The error was corrected later, but people already produced John Mastodon Memes, to show who or what John Mastodon is, or might be.