Like the posts above, I very seldom had much of a problem with CC, but when I did, they were offloaded, PDQ.
Simple as that.
As for catering, if I suspected a slight 'problem', I would stroll back and cook my own, and serve it up, accordingly.
THEN, offload any malcontent in sight.
Period.
GONE.....
PS: The company backed me up, every damn time.
Strange as it seems, it worked, without fail.
Malcontents....color 'em just that, and bye bye.
