It seems that the consensus from all the comments is that you do in fact need a firewall. So my question is how does that look exactly? A hardware firewall device directly between modem and router? I using the software firewall on the router enough? Or, additionally having software firewall installed on all capable devices on the network? A combination of the above?
On my phone when I first saw the picture of the interior, the push-pull lever for gas tank flap and trunk looks like an angry face. Just thought you should know.