Editing the text of a petition? That's... really scummy and worrying. If you can just up and edit the text of a petition, think about what that means. You can collect signatures and then edit it retroactively so that all those people who have signed the petition have unknowingly signed something they don't agree with, because they signed the original petition, not the edited version which could be completely different. And probably there's no indication on the petition that it was ever edited! What site hosted this petition? It should absolutely be blacklisted as a petition website because it's vulnerable to deceptive practices.