Also,because it is illegal to paint public and private property without permission, street artists usually work secretly.

VOA: special.2009.04.08

The decision is followed by a surge in canceled and delayed flights, which American blames on an illegal work slowdown by pilots.

WSJ: A timeline of events in American Airlines' history

The harbor in New Bedford is lined with fish processing warehouses where immigrants, many of them illegal, find work.

NPR: Economists Untangle Truth About Jobs, Immigration

Second, Obama could call for the repeal of all extraneous licensing laws, which make it illegal to freely work at literally hundreds of entry-level or lucrative employments, whether in plumbing, hairdressing, flower-arranging, landscaping, realty services, cab rides or nursing, without first having to waste hundreds of hours and thousands of dollars in unnecessary training courses and bureaucratic credentials.

FORBES: Obama the Luddite: Friend to Labor Unions, Enemy of Job Creators