What do you need it for? The trunk has a button above the license plate that can be used to open it anytime the car is unlocked. If you are inside and someone wants to toss something in the trunk just explain to them where the release is. There is no need at all to have a trunk popper in this car it would be totally redundant.
Oh and another thing, I know alot of people here have complained about the door lock switch being in the center console. This was a bit of a bummer for me as well. I have came up with a solution. The first thing I did was change the settings for door unlock. When I open my driver's door all doors unlock. The second is, you can lock all four doors by pressing the lock plunger down on the driver's door as you exit. You can also touch the black sensor on the door handle if your car is full keyless.
As for the trunk mysteriously opening, I haven't had this yet but I don't put the fob in my pocket all too often. If I do, I always make sure it is by itself in the pocket to avoid anything pushing the buttons.