The more, the merrier. Only thing that bothers me is some loud, screaming, out of control kids. That was the only reason I have ever even threatened to quit an inspection. If others don't introduce themselves, so be it. I don't care who they are. Whoever hired me can also direct the traffic. If I am telling client something they don't want others to hear, I guess they will let me know. Many of the inspections here also involve other inspectors..I show up early to get a parking place.