Report it. Send them home. Every person who cheats takes away a slot from someone who earns it.
http://www.cic.gc.ca/english/information/protection/fraud/report.asp
Also, inland applications are also being refused for silly reasons. just feeling sad for people who have been working so hard everyday in canada and getting only 300 to 400 points and foreign nationals hook up with any employer to get fake work experience and I dont know.
Inland people often submit the applications themselves, and make mistakes. It's a hard form - it's easy to do. Those who use consultants are more likely to have the little mistakes caught, saving rounds. Those who do it themselves will still likely get selected - they may just have to try a few times to get the application right.
As for the foreigners with fake work experience, CIC tries to catch it as best they can. All it takes is one person getting caught to rat out the rest, and we may see P/R and Citizenship revoked for others using the same service.