For the super paranoid, you should verify this information yourself. In theory, this whole April Fools prank could be a ruse to try to get xx user's private information if there was some good reason (such as a national security subpoena) to try to get their information. I think the chances of that are low.
Alternatively, you can leave all the fields blank, and the KYC request at the top of every page will go away.
Well, you can always take a look at the source code of the page yourself. You'll see that the form doesn't send anything to any server.
That is the source code when
you visit
KYC verification page, but there is not anything stopping a different source code when someone else visits that page.
The chances of this happening are very low (close to zero).