Rough is such a relative term. I really think it depends on different factors and situations.
Is the guy playing with a half pack of rolaids or a lead pipe? The former could go town all day with the provider probably yawning.
How many guys has she seen that day? If your the fourth client of the day, most providers probably wouldn't appreciate the rough play. Maybe.
Is the client somewhat attractive? Providers may be more receptive and properly lubricated to a more appealing client.
During enthusiastic coitus, I always just ask the provider, "Am I killing you?" Strangely, every provider says "NO!"