BBM. Exactly, ITA! When I drive my husband's big ol' truck that has a backup cam, I ALWAYS look behind me, and yes, ESPECIALLY in a parking lot. Whenever I'm backing up any vehicle, I always hear my drivers ed instructor's voice (from many years ago) saying: you should always be looking in the direction that the vehicle is moving. So, if I'm backing up, I'm looking back...backup cam or not. Backup cams are helpful, esp. for anything directly behind you, but I would never totally rely on them. JMO and my :twocents:.
I seem to remember that even in ads I've seen for vehicles with backup cams, there has been a statement provided that you should always do a visual check as well.