Public WiFi networks are becoming more common. But are they safe? As a rule, no. Can a public WiFi network be used, even if it is not secure? The answer is yes, taking the proper precautions. A few months ago we were surprised with a 7-year-old girl who had hacked the WiFi in a cafeteria in 11 minutes. It is necessary to know how to check who is using my wifi online. Through this guideline, you can control your wifi connection easily.