I don't know why the handful of reviews are all written (allegedly) by kids, or why this app would scare anyone.
First off, walkie talkies are and have always been a pair or more of handheld radios that allow two or more people within range (couple miles) to talk to each other. Almost always to people you knew and knew were on the other end.
This and other similar apps are behaving nothing like walkie talkies - but instead a CB radio!!! Which had many channels that people from around the world would use to talk, or just listen, mostly to people they have never met.
The developer would be wise to rename this, and create channels based on age groups. Kids should try and meet neither kids, and make it fun by putting a pin in a map so they can see all the places around the end rod they talked to. There ya go developer, free idea no charge.
This a neat app, if it were named appropriately and you had the ability to see how many people were on each channel, their location (country, city) , and age, and could join and switch between them... I bet this app would take off quickly. I'll ,keep watching and looking forward to seeing how this app evolves!