It's unacceptable to curse at people.
Steve was having an argument with the manager in his local supermarket.
Steve wants to express his distaste with the manager.
Steve tells the manager he thinks he's not paying attention to the needs of the consumers.
Steve calls the manager all types of vulgar names, cursing at him.
The manager listens, and tells Steve he'll consider what he's said.
The manager decides to not deal with Steve at all, just walking away from him.