The Stack Exchange team are very transparent and open. Have they considered adding a humans.txt to the Stack Exchange websites?
Because it's something simple and fast to create. Because it's not intrusive with the code. More often than not, the owners of the site don't like the authors signing it; they claim that doing so may make the site less efficient.
In this case, Jeff and Joel take time to blog about each employee, and give them a face on a set of pages specially designed to show off the team. This is, IMO, better than a humans.txt, and 'about' is linked in the top of every page rather than being hidden behind a secret URL.
I might support redirecting humans.txt to the /about/team page, but the current setup is better.
They kinda do, http://stackexchange.com/about/team.
There are no standards to the file. Developers are free to include whatever content they wish. The primary goal is to acknowledge contributors to a site.
We already have something like that, it's the
/users page. There you can see who contributed to the site in quite some detail. I see no advantage in putting that information into an unformatted and unstandardized text file.
I don't see any payoff for implementing this. It would basically reproduce our existing user list unless you propose some sort of criteria where users would be featured in that file.
If you needed to do something exceptional and difficult to game like modem whistling an answer to the server that gets 100 up votes in order to get your name in that file along with geek code, I can see it becoming a source of nerdish pride unlike any gold badge we've seen.
Implementing it just for the sake of implementing it seems like a bit of a waste to me.
"All the cool kids are doing it" seems to be the only argument for doing this, really. As pointed out before, an organised list of contributors to the site already exists, so a humans.txt would be redundant.