This is more of an East Coast thing than here but I agree it is a problem.
Fl IAEI is trying to get serious about counterfeit NRTL stickers but it is pretty hard to do if the guys do a good job on counterfeiting them.
These are showing up in big ticket items too like HVAC systems.

http://www.iaeifl.org/forums/ubbthreads.php/topics/7315/Fraudulent_ETL_and_UL_logos_in.html#Post7315


Greg Fretwell