I really hope it's just a bad joke. If not then It kinda shows their priorities and it's abusive. Also it wouldn't clean worth a sh_t anyway like that because how are you gonna shake out the dry mop and then you still have to use a broom and dustpan. They should love their kids more than that and be more respectful to animals.
I just got some for my kids. My six-year-old saw them (the boot/ sock style) and asked for a pair. He didn't have to ask twice. lol No telling if they work yet because mine just came in the mail today, but I don't see why they wouldn't. Most of my house is tile and my son is very active... he's always bouncing around the house, doing somersaults and stuff. I think he's actually going to like them because he'll be able to glide around the house. I'm a proponent of making cleaning fun for them, so I suspect we'll be having races through the house and other games with them. If they don't like them, I won't make them wear them- I picked mine up purely because the kids asked for them, but I think they'll provide some good giggles, and if they pick up some of the pet hair and dirt on the floor in the process, I will be thrilled.
