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Find incomprehensible code. Get email from blame. Search for them on Linkedin. If they are working as a developer in some senior capacity, then the code is probably a learning opportunity for me. If they are working as a scrum master code is probably as bad as it looks.

I say this in jest, mostly...

I dunno; I've known horrible senior devs who wrote solutions that were clearly resume driven development who ended up as tech leads elsewhere when there was a regime change and actual scrutiny began to be applied to them.

... as a service... ;)

https://github.com/jayphelps/git-blame-someone-else

You should check out GitLens for VSCode, it makes the process of working with git blame seamless.

This is standard development policy at every corporation I've worked at.