Obviously, the character did not read ESB, but the person or people who run the SpongeBob twitter page might have.
On July 24, 2014, at 17:27 (UTC) they released this tweet:
This happened two days after I made my Bikini Top page on this wiki. On this page, I wrote "It might be north of Bikini Bottom". This might also have to do with the fact that a couple days ago, I also retweeted, under the Bikini Bottom Gazette twitter page, the July 4th message:
If he, she, or they saw that Bikini Bottom Gazette had retweeted this, that might also mean they secretly follow the Bikini Bottom Gazette page.