For people in our industry, it's hard to see a definition of "reasonable" that would be financially beneficial. You start a tech company. You pull $100k out every year, putting you right smack in the middle of the income distribution for experienced tech people. But because of a loophole, you get to reclassify $50k of that $100k as a distribution, and not pay FICA on it. To support that (sorry) scam, you claim $50k is your "reasonable" salary --- putting you way on the low side of the industry. How convenient.
People obviously do it and get away with it. I'm glad it's an audit flag.