

Kinda hard to encode it in /etc/passwd
, which separates entries with newlines and fields of an entry with colons.
Of course, you can activate some alternative user database in /etc/nsswitch.conf
and then you can have your usernames with newlines in them, but at least half of the tools on your system that process usernames will take that personally…
To my knowledge, there has been some discussion regarding the AGPL as to whether using software through a network even creates the kind of legal relationship between provider and client such that the client has standing to request the source code. I assume similar discussions would crop up regarding the SOWPL.