What's a petition going to do? Is there any evidence that a bunch of people signing a petition is any more effective than a bunch of people just asking?
I wouldn't set expectations too high though: for the retirement bill, there were many protests, millions of people in the streets, all surveys showing a very strong reject by the people, and the reaction was basically: "I got elected, I do whatever the f**k I want!".
Short of a revolution, nothing can change their mind. I'd rather push other parties to include this in their program for the next elections: repel this absurdity.
On the other hand, it often seems like the online kind of petition is just a away to dissipate the anger and need to do something of people, before they actually do something with significant effect (such as demonstrations and strikes) - they sign the petition and feel they've "done something" lowering their want to do something about it, when they really haven't done amything with the least bit of effectiveness, since a few tens of thousands signing an online petition in a country of 65 million people is something the authorities can simply ignore with zero concern.