I would consider it to be good "Risk Management" when all it takes is a single complaint to potentially ruin your life, and whilst that sounds hyperbolic, people have been sacked for similar things, then once your sacked your financials, house and family are now under stress, work colleagues won't talk to you any more, rumours spread around your industry so you're blacklisted, maybe it makes the press as well so now your family get hounded etc etc.
All these things have happened to people, so yeah, its 100% Risk Management, especially because the person making a complaint doesn't even have to have been the one that was given a compliment, but they can still report you on someone elses behalf, or worse they can just make up a lie knowing they'll be believed over a man etc.