Which ISP configures wifi routers? And I always see unsecured connections from default routers. Don't tell me you're never connected to the unsecured "Linksys" network..
Usually what happens is that they send a box with a router + modem + filters etc and instructions as to how to plug it all together.
They also give you a piece of paper telling you the SSID and key with strict instructions not to tell it to anybody.
I imagine the router also calls home at a regular interval and downloads updates automatically, so if there is a security issue it should be rectified relatively quickly.
As far as I can tell in my googling none of these negligence claims so far have been successful but there has been no clear judgement on this matter to be sure one way or another what might happen in future cases. Also bare in mind that these judgements might differ between jurisdictions.
I simply think that saying "open up your wifi, now you're no longer liable for anything that happens on your internet connection!" is very dangerous advice to be spreading.
Default settings. Many wifi routers work just by plugging in ethernet.
> I simply think that saying "open up your wifi
I'm not suggesting anything besides grandma isn't her IP. I don't see why that's confusing.