Yeah, but they’re great at discharging the righteous indignation of people who might otherwise do something extreme like going on demonstrations or start campaigning for non-“moderate” political parties.
This way people just put their personal data next to a meaningless and powerless piece of text on a website alongside that of other people, get the feeling of release after having done something about what pisses them of, and won’t do anything further about it.
Petitions are the single greatest invention of the Internet Age to keep the masses dormant (Social Media would’ve been it if, it wasn’t that, as the far-right has shown, it can be used to turn some people into activists).
It’s a pretty damn sad thing having to do it if you’re a fair and honest person, but that’s just how the world works.
(There are a few managers out there whom you can be honest towards without them taking away your reward for being efficient of going the extra mile, but in my personal experience those are pretty rare).