Yeah, look at the dates on that document. Antiquated just a bit.
The guy could have gone in and bought a cup of coffee. So he was an idiot for sitting outside in his car accessing the network. The coffee shop owner is really an idiot for allowing his network to be accessible to the public. He is lucky that all the guy did was access the internet, rather than leave him a nasty virus or trojan.
I would encourage you to educate yourself about public wifi spots.
1. Most owners WANT the signal to go outside the walls. Ever see them put tables outside the coffee shops? That’s a hint.
2. There is almost zero risk (never say never when it comes to computer security) to the owner’s computers. They are separated from the wireless network by various means.