To share or not to share - a look at Guest Wi-Fi networks
Guest networks are a great Wi-Fi security feature for many reasons.
Just having a second (or third) wireless network creates a number of security options.
The most obvious is using a different password. Visitors can be given a simple Wi-Fi password (something like "iamaGUEST") while the private Wi-Fi network uses a much longer one.
An additional network can also be turned on when you have visitors and off when you don't. No one can hack into a network that doesn't exist. It can also be used to support older Wi-Fi devices, those that can't do WPA2-AES encryption, without lowering the security on the main network.
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