Any separating line which isn't a domain border (and/or a border of distinct realities) is highly arbitrary. As are borders between states, or religions for that matter.

update:

The best weapons against insults are a sharp two-sided sword of wit and a broad shield of humour.

--shmem

_($_=" "x(1<<5)."?\n".q·/)Oo.  G°\        /
                              /\_¯/(q    /
----------------------------  \__(m.====·.(_("always off the crowd"))."·
");sub _{s./.($e="'Itrs `mnsgdq Gdbj O`qkdq")=~y/"-y/#-z/;$e.e && print}