I loathe anyone that sends CIB games through bubblemail. I've had a couple damaged that way, it's frustrating as hell and I refuse to deal with them again if that's how I receive games through them. Thankfully it's only come up a couple of times.
Once was with my Majora's Mask 3DS through Amazon, though. Thankfully it arrived in awesome shape, otherwise I would have been pissed.