From: Denver, CO
That being said, I'd support simply prohibiting having two simultaneous sessions running on the same computer, recognizing that a hard-core cheater would be able to use a different computer.
I would probably be pretty averse to playing with a mode that flat out would prohibit opening turn more than once. I would really unhappy if had a long game going on and and it got terminated, or corrupted by some unfortunate event totally unrelated to cheating.
(My emphasis added)
IMO Rick has put his finger on the issue. "Stuff" happens, and as a reasonable player, I would accept explanations from an opponent as to why a turn were opened twice; or know that he might be playing on two computers, which generates that "wiped logbook" message, IIRC.
OTOH, if an opponent had "explanations" every other turn and seemed to be uncannily ready for my Paradrop, THEN I'd probably put him/her on my "never play again" list.
If a "Terror Anti-Cheat" mode is developed, I hope it would be added as an option to the current one. If a truly competitive Ladder really takes off, it could be used on these shorter scenarios.