There are all kinds of ways to look at wireless security, but any unsecured wireless
network makes any such user into nothing but a WIFI hotspot. Not to say even hardwired networks can be also hacked, but then the means of attack is different. As adding wireless to your network exposes a far easier means of attack to any self respecting hacker.
So please someone anybody please take my wife who is connected to my wireless network that could be hacked by someone else. As I only have her connected by a medium security password in her computer room 25 feet away due east of me. And of all the 802.11 standards, be it C, G, or N, I would have to have to use the longer range N standard when C will do the 25 feet and not much more through 4 layers of drywall. In terms of the nearest public road 80 feet to the North, I put a handy dandy metal plate blocking wireless to the North but not the east. After that to the East, its many more layers of drywall and siding plus close 250 feet to the nearest public road to the east.
After that I always know how many users are connected to my modem, I may be one, my wife may be two, I can also connect up one or two wireless capable laptop's that know my medium security settings, but still I always know how many of my devices are connected at any given time. Plus there is no public parking on any of my streets. And to get any closer a car or a person I could see from my computer room window would have to trespass on my property to get close enough to even detect my wireless network. And the very second they hacked my medium security security network, and added themselves in as a user, I would be shutting my modem down.
Has not happened in three plus yet, but I will cross that bridge when I come to it. The shorter your wireless range, the better we are protected.