Consider it as an internet meme

Copied, modified and spread, until it supercedes the original meme

And then you have the original meme's creator complaining about his meme was stolen

You'd tell him to shut up, its the natural existence of a meme, to be subsumed and regurgitated in new fashion

That's how I see this, anyways. Art should be modifiable in this way; though I don't have an opinion on the ownership of the case, but it seems to me (based on charging bull's wiki) that Modica is overly defensive about his meme in any context (possibly purely for licensing's sake), and fearless girl clearly kills any value Modica has in charging bull

In spirit I think fearless girl is fine; in practice, its pretty messy.