You could, but there would be a significant risk of serious reputational harm.

This is probably what I would do. Keep around the high margin customers like the OP, but do something with the Complainy Pants Inc; either force-migrate them to a higher cost service tier, throttle them until they leave, or maybe just slow down their service.

The key to remaining competitive in cut-throat industries is knowing where to spend your limited time and money.

And now you've discovered the business model for Planet Fitness.

"either force-migrate them to a higher cost service tier, throttle them until they leave, or maybe just slow down their service. The key to remaining competitive in cut-throat industries is knowing where to spend your limited time and money."

How does this apply to Planet Fitness in any way?

Lunk Alarms are exactly this: a mechanism for ridding your company of high cost / high maintenance users to focus on the more profitable ones.