Wireless is insecure by design. That's why I don't do wireless. If you use a wireless network, keyboard, or mouse, then a hacker can intercept that communication. Your implicit intention is to broadcast your computer activity to the entire world.
I've never understood why people will pay a premium for wireless keyboards or mice when extension cables are dirt cheap. Wireless keyboards and mice are inferior in every respect to their wired cousins. Wireless input devices are not only insecure, but require batteries, which is a huge hassle compared to hassle-free wired input devices.
I've also never understood the appeal of wireless networking for indoor use. I can understand using wireless when outdoors or in the car. I just don't get using wireless in a home or business. It is both slower and insecure.
Many of my neighbors use wireless. I know because my laptop picks up their home networks. I don't hack them. But someone with less morality could certainly attempt to hack them and at the very least use and abuse their internet bandwidth for his own purposes. I fault the local ISP's for promoting wireless internet services for their own convenience, merely because their technicians don't want to crawl around in the crawlspace.
Running ethernet cable under the house only takes an hour at most. A man has to have a powerful case of the Lazybones to prefer wireless. By doing so, he will have a slower and less secure network.