delegation-only: Who?

[Jim McAtee]

Over the past several days I've read a lot of conflicting opinions on which
TLDs could/should/can be safely designated as delegation-only.  The list of
those zones that should not be so designated seems to be constantly shifting.
I've come to the conclusion that we won't be using the "root-delegation-only"
option, as I can't make heads nor tails of the statements.

So, I'll use delegation-only zones.  Obviously "com" and "net" will be
designated.  What others can safely be designated delegation-only?