I'm sure we all know that most residential locks can be picked with relative ease, but criminals rarely go through the trouble. The one time a person did "break in" to my house, they just opened an unlocked door. Usually I keep that door locked, a large piece of plywood in front of it, and a table saw braced up against that. Just so happened I worked on a project that day and just forgot to lock the door. Lucky break for her, but trying enough doorknobs she was bound for find some. She had gotten into two other houses that night. She was also tripped out on meth and couldn't have operated a WiFi jammer if she wanted to.
So, yea, a WiFi camera isn't great, but it's still going to get 99% of criminals out there. Next we just need WiFi jammer alarms.