A marketing faux pas/way of business where you don't take care of your customers as well as treat them like shit, and sooner or later a berated customer gets vocal, shit hits the fan, the PR goes viral, and in a matter of hours your business and name is kicked to the curb by your industry.
Paul Christoforo, who ran ocean marketing (also spelled "ocean marketting"), berated a customer in an email convo, after O.M. wouldn't tell him when his video game controller purchase would arrive. The customer then sent the email convo to Mike Krahulik, a big name in the gaming industry (PAX convention organizer and penny-arcade.com co-creator) who posted it, effectively ruining O.M.'s chance of working in the industry again.