Has anyone thought about using private single engine planes to fly banners over strategic locations in Washington, DC?

I was thinking how great it would be to fly some anti-illegal immigration banners over the Capitol Bldg. in DC during morning rush hour and the lunch hour - when everyone is out and about. It's one way to get the attention of Congress and the public.

It's a relatively inexpensive project ; there might be private pilots out there who would be interested in donating their time.

I would be more than willing to donate to the project.

Do we have any pilots out there in DC who would be willing to contribute some ideas, i.e. hourly rates, availability, etc.?