Cameras that I see as worse than the glasses already exist. Just google "spy camera" and you'll see lots of options that come in all sizes and shapes. Cameras integrated into caps you wear, cameras disguised as pens or clocks, cameras about 1cm wide that can be hidden just about anywhere in a room, others you wear around your neck as a necklace, the list is endless. Kmart sells a camera on their site that could easily be used for abusive purposes. Or it could be used to watch over and soothe a baby.

I see no point in being riled up by one style of camera being sold at one retailer. Do I want randoms filming my kids? No. Can I stop them? Also no. Unless we make a serious cultural change to our society, it's decades too late. The simple fact is that anyone can stand in a public place like a playground and film kids. They can do it secretly with a camera embedded into an item of clothing. They can do it blatantly with a giant television camera mounted on their shoulder. This is perfectly legal - you can't stop them. All you can do is remove your kids from that public place.