An unguarded access point can open up your network to people outside your four walls. Wireless networks are inherently open channels: Anybody in the vicinity can eavesdrop on your signals. The standard way to secure wireless networks is using the wireless equivalent privacy (WEP) standard. Most security-conscious administrators have decided not to trust them. Instead, they plan to use their traditional Virtual Private Network (VPN) software to secure their wireless networks. But banning wireless wireless is hard because the technology has gotten so cheap.”]
Source: https://www.csoonline.com/article/2117864/sweep-time-for-rogue-access-points.html