I appreciate the gesture but this does literally nothing. Even though in current situation standing up to the regime may bring serious consequences signing petitions has the same impact as sending thoughts and prayers. This is Putin, he doesn't care.
The majority of Russian population didn't and won't hear about the genocide that he unleashed on Ukraine. Out of those who have, a large portion flat-out denies it as western propaganda. What has to happen is physical presence on the streets. Yes, that will result in mass arrests, then violence, then Russian people dying. In the end, when the change achieves critical mass, the army will join and end Putin's reign.
I've seen the events of Romanians freeing themselves from under Nicolae Ceaușescu's boot in person. It's horrific, it's tragic, it's heart breaking. Freedom costs dearly and is paid for in blood and human sacrifice. That has always been the story of peoples' fight for independence.
It will happen sooner or later because the next, much stronger incentive for the Russian people to enforce change, will be hunger. This however will happen long after Ukraine is wiped out.
Slava Ukrajini.