With all the smart-phones & tablets around these days I would think most people have a home WIFI network.

We live in a townhouse complex and our phones pick up a dozen or so with varying signal strengths.

Unbelievably one of them is unsecured and we can connect to it. Even tho its signal strength is a bit lower than our own.

Sometimes when we arrive back home after being out our phones will connect up to it automatically before our own and we don't even realise it unless we check.

Whoever they are they really need to get their security settings fixed up.