It’s a common choice for adding noise to snitch lines (e.g. a webpage or email address for reporting that you think your neighbor is an immigrant or that your boss hasn’t fired your black colleague yet).
Lots of folks spam those channels, and the bee movie script is a meme text to spam it with.
I hate that I do this, but when I do finally respond to an email or letter and it’s been too long, I sign off with “Yours eventually”