please Sir, i guess im a little confused by the question. While it's sweet to want to thoroughly safeguard everyone, You would need to know the ins and outs of each person's mind to an extent that just isnt reasonable for just a party organiser, is it? Plus, an activity or treatment one finds fabulous another might find abusive and they both may be right for their own situation. So much of it is subjective...

Please Sir, i would tend to imagine all You could do is set general rules on what activities You will tolerate or not at said gathering. If people want to do something not allowed on the list then they can do it at their own place. That way, if its clear ahead of time before anyone starts doing their thing then the judgement can be on something less subjective- did they break the house rules or not? Less room for arguments *smile*

Please Sir, i imagine some judgement would still be needed of course but a clear outline of unacceptable activities or behaviours before anyone starts ought to make Your job much easier and keep people from coming back on You if they dont like Your opinion. It's still kind of You to be a listening ear but then that could then be seperate.

Or was i unhelpful?*smile* did i miss the point? well, it was just an idea anyways ..