[Publius6961]

A "private" suicide pact is enforceable?
As long as the parties are all bound by their agreement?

Is an agreement to abide by future unspecified changes without limit binding?

[Labyrinthos]

A "private" suicide pact is enforceable?

Flying the flag vs. killing yourselfs.

Not a good analogy.

Is an agreement to abide by future unspecified changes without limit binding?

Depends upon whether the changes are reasonably foreseeable.