If you don't expect the well heeled traveler to know common courtesy, why do you expect the hourly waged lounge staff to enforce basic courtesy? Are you really expecting the table cleaning staff to also be the rule enforcers?
This type of behavior sucks, but I guarantee you the lounge staff isn't being paid enough or have the patience or authority to 'police' the guests who berate them enough already for just doing the job they are actually paid to do.