I've always wondered how effective it would be to publish a local/regional/ or national magazine consisting of pictures of people picking-up and or working illegal aliens. Kinda like the prostitution pictures published to punish and embarrass the prostitution crowd.
Here’s a website that takes pics of illegals getting picked up by employers. I don’t know how up-to-date it is.
http://www.wehirealiens.com/index.asp
Lots more input from the public as to which companies hire illegals and which companies DON’T.