If you contribute code to a free software project, people are going to use, extend, or modify it. They don't have an obligation to ask permission or even inform you. That is kind of the point.
I agree that the change is maybe not the most well thought out and introducing ambiguity in the meaning of a symbol is probably bad software engineering in the long term. But to call it "an act of aggression" is unhinged.
In meme form:
> contributes code to a free software project
> someone else touches that code
> suprised pikachu face