If I'm not mistaken, the initial warning was sent to via e-mail - not on-wiki. Also for clarificiation, only OrangeMarlin is claiming to be a member of the US military (inactive reserve). Jim is apparently in the treasury department, which in my mind indicates a separate type of obligation. I'm also not sure that the point that both editors are admins is true or relevant.
The issues are:
1) Are we under an obligation to prevent obvious violations of the law when we are aware of them, as in the case of all military IP edits being illegal (or some similar situation in another part of the world).
2) Can editors with an affirmative legal obligation warn other editors of this obligation and their exposure to it off-wiki? Is there a difference between warning them on or off Wikipedia?
3) Are the legal claims being made by OM, Jim62sch and others valid (with respect to their obligation, and the legality of editing by military IPs)?
Nathan