What petition? The article didn’t mention any, and I haven’t seen anything about a petition posted in here…
A quick Google search doesn’t reveal anything either.
Shunning modders simply for signing a petition seems like a major overreaction. Most people signing a petition don’t really read the contents. They usually just go for the quick explanation which was probably sold to them as something like, “sign this petition to ask Larian Studios to better support mods/Script Extender”.
I do feel that modders need to chill out and accept that major changes to the codebase are still happening and that will cause conflicts with mods. It’s great that Larian Studios has expressed their willingness to support mods in the future. I think that’s certainly enough for me.