I've tried to look it up but I couldn't find any petition against it. Is there none available ? Such things are small sure but hey... voicing dissaproval is better than nothing.
Or more aggresive solution is for people to unite to flood the company mails and medias with complains on top of reviews bombing on all theirs curent projects and works allready out there. In this mostly digital world threatening their online credibility, their ratings and jinxing their medias have been a really decently effective way to pressure companies into following the communities will; especially considering how little they would lose by listening to the community in this specific case.
The problem here being... I don't really know how many people would actually join the effort. Rpg maker is well known but developpers in it are quite niche so even with the help of followers of their works I'm unsure how much of a riot could be built up AND I don't know how big the company behind rpg maker is.
There is a threshold of pushback they can whithstand so the question is... How high exactly is it ?
Trying is better than nothing though so if anyone were to file a petition and build a small website with access to the company contacts and websites I would be happy to join the resistance effort.
Petitions don't actually accomplish anything. When dealing with government entities formalized complaints SOMETIMES do, but even that is an extreme longshot (Stop Killing Games for example got EXTREMELY lucky, and they may still get nowhere in the end). But GGG is not a government entity.
What does work, to some degree, is direct communication on whatever platform they're actually paying attention to. There has been a LOT of that on the new, crappy forum, and they have responded to some degree: supposedly they're looking into archival possibilities at the very least. But we'll see.