No offense, but online petitions are generally laughed at when it comes to real events that do require some sort of public outcry to change.
Names and identities can easily be made up and 'signed' to an online petition, and tracking people down to verify identity is practically impossible, due to ISP tracking and the variants that entails. There's also the fact that numbers could be easily be skewered. I could, for example, use a proxy and sign the petition 100 times (with different information I nabbed from my phone book).
Online petitions are generally not admissible or even thought of as 'true' petitions in most cases.
If you really want to fight against this---write an actual letter, or call. THAT will make them notice.