Amusing and provocative concept, but pragmatically challenged as the majority of people don't use apps like Foursquare or other check-in services. Moreover, tho

Amusing and provocative concept, but pragmatically challenged as the majority of people don't use apps like Foursquare or other check-in services. Moreover, those that do are likely not a representative sample of the broader population... so, as a proxy for crowdedness, the data feeds from apps/online services fail in most cases/places, IMHO.