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.
None of this examples seem to fit your original statement:
> Just because a single instance of an activity is legal does not necessarily mean that N instances of the same activity are legal.
> 1. Marrying > 1 person
Is not n instances of marriage under the same conditions. It seems like to fit your original statement it would have to be that one couple marrying was legal while N couples marrying was illegal.
> 2. An S corporation can have at most 100 share holders.
The number of people is changing but it is only one instance of forming a S corporation not N instances of forming an S corporation.
> Zoning limits on the number of people that may occupy a structure are common.
The N+1 person moving in is not really doing the same things as the first person moving in similarly to the unlawful assembly.
It would be interesting to look at laws implement actions which are legal with 1 instance but illegal with N, but the example you have quoted so far to do seem to have any carry over to the Aero case.
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.