Though the point and goal is obviously to get rejected, I prefer the rejection ideas that have a chance of nice outcomes if not rejected. So, the mail a famous person a book idea over asking for a seat.

Some additional ideas:

* Ask for a raise

* Ask your employer to send you to a conference

* Ask the conference holder for free admission to the conference

* Ask for a neck massage (even better if you don't know or just met the person)

* Offer to buy lunch for somebody you admire but have never met

* Ask a friend to do your laundry

* Create a reddit post saying it won't make it to the front page :)

* Leave your wallet at home one day. Ask starbucks for a free coffee, ask a coworker to loan you the cash for lunch, etc.

* Got any debt? Call your debtors and ask for it to be lowered.

Update: Looks like the parent comment has been updating their suggestions as I was typing, so there's some unintentional dups here.