My advice would be not to worry. While there is a small chance that it may interfere with your diving, when you're on a liveaboard you have the maximum choice, so long as it is able to leave port - and the authorities are unlikely to stop it.
Normally the first check dive is done close to port so if they need anything they can dash back in to get it. Also because the dive sites near port are shallower and often not so great and you can safely put out-of-practice divers in the water without worrying about further damaging the coral.
I'm speculating but I would imagine any Sharm liveaboards would simply head south and leave the controversial area well behind them, doing the check dive somewhere else, and leaving the area, to make everyone more comfortable.
Another reason not to worry is because none of these attacks have happened on divers. The truth is when you're wearing scuba you're bigger, more mass, you're often part of a larger group and you're spewing loud confusing bubbles into the water. You're not thrashing about on the surface. While a shark might swing round to take a look, you just stay calm, look it in the eye, back away gently and it won't bother you.
That's not to say that there aren't good techniques in dealing with a shark encounter - keep blood out of the water (spearfishing wont be allowed from a liveaboard anyway), don't chase after it, establish eye contact. Be aware of your surroundings. Don't 'flap', have calm clear movements. If it's doesn't feel right, exit the water smoothly without making lots of splashing at the surface.
So if you're worried, just talk to your dive guide, and follow the rules he or she lays down. Ask questions if you're not clear.
I've dived with Tiger Sharks, Bull Sharks, lemons, hammerheads, reef sharks, duskies, galapagos sharks, an oceanic white tip etc... they're amazing creatures: follow the local rules and with a clear head you can enjoy the encounter safely.
By the time January rolls around there will be a clear plan to deal with the rogue shark - I hope it doesn't involve the mindless indiscriminate slaughter of huge numbers of these amazing animals.