This happened (to a lesser extent) in the line I waited for... in King of Prussia, PA (a rather small suburb of Philadelphia approximately 2 hours from NYC).
When I got in line at midnight, there were about 50 obvious Chinese scalpers. It really pissed off everyone else in line and the entire night, the scalpers were quite loud and obnoxious, and cars/vans with more of them kept showing up and cutting in line with their fellow scalpers.
Hopefully Apple will do something to curtail this in the future. It was really pretty awful.