I've just stumbled upon an issue  open by Jake on Subgraph OS bug
tracker, about this topic, so I thought I would close this thread
that's still lying in my inbox, and sum up the process that lead us to
a (not implemented) conclusion.
Last time we discussed it over 2013 and 2014, first on this list
(threads start at  and ), we ended up deciding  that we
preferred a shared username+hostname among anonymity/privacy-related
The username that was settled upon is "user".
The hostname that was settled upon was "host" initially, and then most
of us preferred "debian"; but since the goal is to _share_ a common
hostname with other distros, prior art counts.