> And there are lots of examples where an activity is only illegal if N>>1. Unlawful assembly, for example.
Unlawful assembly, at least as it usually is defined in the US state laws (the British form has been expressly repealed for decades, and so isn't an offense in any case) requires not only a purpose of disturbing the peace but the completion of some offense, and so would be illegal in the N=1 case as well, not only in the N>>1 (or even just N>1) case.
So, while there may be a good point here, that's not a good example at all.
Unlawful assembly, at least as it usually is defined in the US state laws (the British form has been expressly repealed for decades, and so isn't an offense in any case) requires not only a purpose of disturbing the peace but the completion of some offense, and so would be illegal in the N=1 case as well, not only in the N>>1 (or even just N>1) case.
So, while there may be a good point here, that's not a good example at all.