I know a person who regularly pays H & R Block to get them a refund for close to/less than they pay to H & R Block.
He's a manager in retail.
My parents got a letter from the IRS this year demanding all sorts of answers, my mom had accidentally wrote the wrong number from one form on a line on another so it made the total off by like three dollars. She sent it back with a letter explaining the error. The IRS sent like three more letters demanding she respond. Just the other day they finally sent one saying "well, okay, we got it, you're fine...this time."
I assume it's because of my postings on the internet. Especially about BA's synthesis. I can't see any other explanation.