I visited the UNITED STATES INTERNAL REVENUE SERVICE (IRS) website in April 2005...

Internal Revenue Service (IRS)

And saw this...


This company hired this ad/lead agency to run popup ads THAT TRIGGER OFF OF THE IRS.GOV SITE through this popup vehicle.

More Information:

US Taxpayers fund the IRS.GOV website.
Why does the FTC allow companies to advertise and profit from it?

Further resources.