Let's distinguish between rights and abilities and avoid language subject to
misunderstanding as referring to one instead of the other.
| You can have no reasonable expectation as to the distribution of
| your message (the membership database is private (even to me, as
| much as I can)) other than that you have no control or effective
| rights (ie enforcable) in the area.
Then let's say, "that you have no control or enforceable rights." "Effec-
tive" can imply "under the law as it is applied" (in contrast to the law as
it is written or seems to be written); what you are describing there is not
the law as it operates in the real world but the real world as it operates
regardless of the law.
| You can have no reasonable expectation as to the lifetime of your
| message (anybody, anywhere, on the list or off, is technically and
| undetectably free to archive/store/cache any message for any
| length of time).
Let's say "technically and undetectably able to archive/store/cache any
message" (or "technically able to archive/store/cache any message undetec-
tably") instead. "Free" can be taken to mean having lawful permission, but
your point is about technological capability.