For example, I don't want anyone to know my real name. I'm not up to any mischief (criminal or otherwise), I just want the separation of identities. There isn't a single entity on Earth that I'd feel safe delegating this knowledge with if I could avoid it.
Disclaimer: opinions are my own, not my employer's (Google)
I'd argue that "thinking twice" should be the standard bar for all open source dependencies, not a discrimination levied towards anonymous or pseudonymous developers.
(Though, to be fair, I doubt Google would ever use any of my code. I know your cryptographers; they don't need me to contribute lol.)