I've noticed an increase in people in other states posting their cars (Porsche and other) in other state's craigslist listings.
I usually flag/report them, as it violates the CL policies (i.e., nonlocal content)
http://www.craigslist.org/about/prohibited
Pisses me off. I get excited to find out about a newly available Porsche in the local (or neigboring city) Craigslist, only to find out it's in New York or Pennsylvania.