Maybe they get their advice from Nike - Just do it.
An organization and a clothing company both have used the Obama's in advertisements without permission. The other day I noticed a story about PETA using Michelle Obama for their no fur campaign. Today I see an article about President Obama being plastered on a Times Square billboard.
This story was also reported on the Huffington Post site.
I guess both groups got what they wanted - publicity. The news media coverage of it helps spread their names or brands. It's wrong for these groups to use cheap tricks to promote their brands. I think less of them because of it. If only it could backfire on them and then others might be discouraged from cheap tricks like this.
These decisions in creating ads using public officials just shows the lack of respect within those groups.