No other bad actors can get it, but we don't know if it's already been found, and now that it's gone we have no idea what data is out in the wild. And as you note, we can't trust the companies to accurately report it themselves.
The streets are lined with cars, but the pavements aren't. A lot of places already have narrow enough streets -- we should be making it easier to walk around, not harder.
man is universally known in the industry, and supported (to some extent, at least) by project authors/maintainers; this project will be forgotten by almost everyone (and start decaying) as soon as this post is off the front page here.
They're publicly well known, and as far as I'm aware they don't have any rules against telling people you're a member. Many of their temples/lodges/whatever you want to call them are identified somewhere on the facade (Freemasons' Hall in Edinburgh for example is available for hire as an event space).
However, what they do and talk about within the lodge is secret.