Well, I don't mind a delay, but 12 hours is IMNSHO a bit excessive. I think that many people have an afinity for a particular country, and will generally log in with that country as a habit. I used to switch sides to the underdog sometimes, but never do it now. If the limit were just an hour, or maybe two, I would think that would be plenty to prevent the deleterious effects of too-frequent side-switchers, while still allowing people to balance sides (without being stuck for the rest of the day in a "foreign" country).
We (the Buccaneers) have occasionally had problems with the 12-hour rule when we'd fly organized missions in the main. How about a compromise here?
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Sabre, a.k.a. Rojo
(S-2, The Buccaneers)