I completely agree with the no giving food scenario being entirely inappropriate and a violation to the childs well being. However I would try to stay in the group, I know it may be hard sitting there and not interveening but just you being there and showing them that there is a better way to handle things is important. They may not "get it" the first time or the 50th time, but eventually if you stick it through and stay consistant and let them know you are willing to help them change, one or two may come around. Maybe instead of phrasing things like, "I do the disciplining" Oops just realized she was talking to YOUR child sorry, but maybe when you see something starting suggest, "I had a similar problem with ____ I found the best way to handle was to _______." That might let them know you can relate to them and your able to bring up an alternative discipline. HTH.