Server name in psql prompt

Is there any way of getting psql to display the name of the
currently-connected server in its prompt, and perhaps a custom string
identifying e.g. a disc set, without having to create a psqlrc file on
every client system that's got a precompiled psql installed?

I've just come close to dropping a table that would have been
embarrassing because I couldn't see which server an instance of psql was
talking to. Now obviously that's due to lackwittedness on my part and it
could be cured by installing psqlrc files- but this might not be a
viable option since it means chasing down every psql binary that's been
installed on the LAN in an attempt to protect users from self-harm: far
nicer if the default psql prompt could be loaded from the server.

--
Mark Morgan Lloyd
markMLl .AT. telemetry.co .DOT. uk

[Opinions above are the author's, not those of his employers or colleagues]