This is a government agency that is commiting widespread breach of privacy. A petition will not be respected. It's an OK start, but it will be essentially meaningless.
If you want results, riot in the streets. Civil disobeience. Historical actions and movements that achieve some measure of peace.
The ease of an action corresponds to what it can achieve. Do you want change? Show the government how badly you want it. Fight for your rights. Don't just click a link.
They've demonstrated they don't care for the voice of the people. So change the domain to something they do care about.