Earlier quoted context omitted.
> Just because a single instance of an activity is legal does not necessarily mean that N instances of the same activity are legal. One person does something it is legal, but if N people do it it is illegal? I do not think that is what you are trying to say, but I can not isolate what you are trying to say.
Actually that's exactly what I'm saying. And there are lots of examples where an activity is only illegal if N>>1. Unlawful assembly, for example.
I thought about that example specifically and it does not seem to fit.
Normally the problem with too many people assembling is that they they block businesses, road ways, etc. In this case each person is not doing the same thing as when N=1. Some N+1 person comes along and decides that it is ok to block a door way or a road, or can not tell that their addition adds to an egress problem if there is a fire. In the example of unlawful assembly of N>>! people are not taking the same actions as when N=1.