Possibly asking a mod/the organiser would be a good idea, yes. That might work because, even though they might not see everything that happens, they will have seen a lot of the goings-on or have been told about them and know who to avoid 'recommending' (and I used that because I couldn't think of a better word).
I agree that a munch is a social meet only and should be that.
Anything that is arranged for after the munch is up to the individual and is not connected.
Some people however, don't understand the concept of no pressure and social and need to be either reminded sternly or banned from attending in my view.
Luckily I've only ever had a problem with one person at a munch and I can assure you if that person comes near me again I will act violently in self defense.
I may be small in height but I expect respect.
From my experience of "organising" I find pays to stick to a basic set of rules that all the partiipants will know , understand and hopefully abide by. Without doub't there will allways be "The one" who will be a problem but the key here is to have a pre arranged strategy to stop them before the situation gets out of annoys others.
Door staff , bar staff and "the management" all play a vital role and its a tough job but having said that it can be fun working with a good team!
Good luck, THE MANAGEMENT (sorry lads not tonight.....wrong dress, strictly no clothes allowed...)
As a newbie who has never been to a munch maybe I can add something. A problem with many social meetings (not SH, but any) where there is an existing conclave who all know each other is ensuring that new members are made welcome and, as part of that welcome, become aware of what is expected. If a group of "old hands" were bahaving in a certain manner it is quite possible that a newbie would mis-read the rules.
I used to chair a social club for 18-30 year olds (when the Earth was young...) and we found it useful to appoint two hosts - male and female - who would act as the introduction person for a new member looking (as so often) somewhat lost.
This allowed a degree of control and ensured that the first-timer enjoyed a low-risk and happy (mostly) visit. Does anything like that happen at munches?
Mac69