Can you edit it? You should take out the "especially a young black teenager" part and take out the "the" before "Zimmerman" in the 2nd paragraph.
With the "especially" part, it makes it seem like you're implying black children are more important than children of other races which is not good for PR.
Exhibit A (from the petition):
When a man can kill a child and walk away from it legally (especially a young black teenager) there is no reason from him to be acknowledged as a 'celebrity', nor should he be allowed to benefit from it. As much as we all would like to see George Zimmerman get his head knocked clean off, allowing this "celebrity boxing match" to go on does nothing more than make a mockery of American justice even further.
Join us as we continue the fight for justice of Trayvon Martin and his family. By signing this petition, we will tell the Zimmerman, his promoter, and any of his supporters around the country and the world that killing kids should never get you any recognition anywhere other than being the selfish and cowardly human being you are.
Justice was never done for this young man, Trayvon Martin. It's time that the people issued some of their own.
In other words, I would remove the bolded parts.