moo...i think what youre saying may be developing the theory nicely. Youre bound to hit one string harder than the other, and that wil obviously start off vibrating more vigorously. Energy will then start to transmit itself (via the body of the instrument) to the more weakly hit string by resonance, and then start coming back. Possibly in quite an alarmingly vigorous way(at a fairly invisible level).
   Just how alarming resonance can be: well, who hasnt seen the film of the Tacoma Narrows bridge breaking up. And how about the strange phenomenon of boats close to each other in a gently rocking but windless sea(it has to be windless, otherwise they can sail out of the problem). The pair of rocking boats end up parallel, and exchanging energy by the waves, which has the interesting effect of slowly drifting towards each other, and their rocking increases. This has resulted on occasion with the boats touching, and then breaking each other to pieces. Strange, but true. So why not bouzouki strings?