What's more, it shouldn't work. When people submit WtP petitions demanding that the federal government research this or spend more/less on that or provide some additional service or whatever, it's fairly harmless. Even if the petition somehow miraculously causes real action, it's just government spinning its wheels and spending money.
When you start using petitions to bypass due process in the judicial system, you open the door to mob rule. Don't like someone? Start a petition to have them prosecuted. With a population the size of the US, it won't take any effort at all to round up enough participants who share your dislike of that person, or just follow the crowd, or do it for the lulz.
I detest CoS and agree that they have abused their "religious" exemption in horrific ways. But I can't get behind any crowdsourced efforts to take them down.
First, they came for the Scientologists...