No, the electric meter and power transformer act as block on the signals that are transmitted by your network; so there is no chance of them leaking out on to the public electrical wiring, and your neighbours picking them up. Additionally, your neightbor would need a similar PowerLine adapter, but if they did, your network signal is encrypted. For even more security, change the default 128-bit AES security encryption password on the Adapter by using the Push Button on the bottom of the device.
