Beware of driveway paving scam

A young Russian-sounding guy rang our bell today.  He said he had leftover asphalt and wanted to pave our driveway for $4/foot.  He was driving a small white car, wearing heavy silver chain around his neck, slicked back hair.  This is a clear scam:
http://www.dailycamera.com/boulder-county-news/ci_23916444/boulder-sheriff-investigating-driveway-pa...