[Geysers] Last names

[Mike O'Brien]

> Please consider using people's last names.

	I'll be blunt: I do not consider that, in the balance,
it's worth it to sacrifice writing style for the sake of
future historians.  I sympathize with their plight, but I think
their needs could be met by an occasional cross-reference
tying first and last names together, rather than burdening
every message with complete monickers.

	Yes, I'm getting crankier as I get older.