I wonder if hiding the tool would help. Anyone interested could simply archive and hoard potentially interesting images until such tool emerges later. So in reality, it would change nothing, only slightly delay the images being extracted.
The only thing I can think of that would have made a real difference is to send a tool to fix the images to all image hosting platforms in advance. But which ones do you trust?
That was my first thought when I clicked on the website link in the Twitter thread -- expecting a disclosure/high-level info page in the fashion of the last decade of big-deal exploits with cute names -- and found only a tool the tweet author (not OP, but apparently working with him?) built that runs in-browser, requires no knowledge/setup, and appears to enable recovery of cropped-out image data at scale by even non-technical users. Jeez.
Edit: I find myself wryly weighing this against the ongoing unleashing of LLMs upon the world. Both have shades of clever people prioritizing being and demonstrating clever at the cost of... other stuff. On the bright side, it is distracting me from facepalming at the underlying Pixel bug.
If you send me some extra information than you intend, nothing stops me from just looking at it.
Google is irresponsible (current, not past tense, is and was always).
Everything after that is fair game.