Re: Is it okay to draw your own union on the flag?
Flags with political symbols (peace signs, dollar signs, corporate logos, etc.) in the canton are very common, and have been around for quite a while. Historically, they seem to have been favored by liberal causes. However, the conservative "Tea Party" movement has recently created one of its own. There's a discussion about it in this thread:
http://www.usa-flag-site.org/forum/new-patriot-innovation-flags-appearing-6590.html
Nick is right that such flags are not covered by the flag code because they are not technically US flags. However, the fact that they resemble the US flag is an important part of their symbolic value.
Peter Ansoff
"We live by symbols, and what shall be symbolized by any image of the sight depends upon the mind of him who sees it."
-- Oliver Wendell Holmes, Jr.