What "air line" are you referencing? By the pics it looks as if the "air" part of the Air shock has replaced the smaller normal shaft and the coil spring portion of the shock with an air cylinder that is overall the size of the outer coil spring diameter that it replaced. It doesn't look to me that there is an air line that could be pinched. And if something is big enough to damage that large cylinder in that part of the bike, it would have most likely damaged a normal shock too. On top of that, it's nearly impossible to get at today's shocks as the bikes are built around the shock and they are generally protected from all sides, so there isn't much risk of shock damage in normal riding conditions.
Looks like a cool idea and a good way to save weight.