This reminds me of how my father (a lawyer) sent fake subpoenas to invite people to his brother's bachelor party. Most found it hilarious but it freaked a few people out. I suspect that this would have the same problem.
Sent one to my college roommate and sat quietly while he got home from class and checked his email. He obviously started panicking until the link in the email revealed the joke. He didn’t think it was funny and swore cold blooded revenge that I’ve yet to receive. Still keep one eye open at night.