Sexual orientation complaint
We have an employee in our warehouse who has been with us for about a month who has come to me to complain of verbal abuse from a few co-workers. He is openly homosexual and they are apparently referring to him using nicknames that are derogatory.
I should note that the environment in our warehouse is one in which everyone seems to get along, and although there is a fair amount of joking (some of it involving use of foul language and name-calling ), to my knowledge it's alwasys been good-natured. That having been said, it's apparent that this employee is offended by the language and I want to address it. So I approached the supervisor who oversees the warehouse, who was surprised to hear about it, and claimed that the employee who complained was a willing participant in back-and-forth jokes and name-calling with his co-workers. He felt it would be unfair to single anyone out (by speaking to them individually), but agreed to tell all the workers in the warehouse that he'd "received complaints" about their language and to "watch their language" from now on.
That was a few days ago and I haven't heard anything else. My question is, what else can I do? I wouldn't tolerate comments based on protected status ( sex, race, etc) but employees aren't protected on the basis of sexual orientation in my state (I checked). And while we would never allow swearing in front of customers, etc., we don't have any rule prohibiting swearing, teasing, etc. among co-workers.