A relatively new offense that is gaining some attention in our society (e.g., this ars technica piece) is WiFi freeloading, a situation where someone or a group with a laptop (sometimes even a desktop) find a wireless access point (WAP) available and log on to it, surfing the web on another person's dime, or checking e-mail, whatever. Some see it as opportunistic web usage, others a form of "theft of service". This is an issue that has come up in classes repeatedly.
It will be of interest to see how this issue is managed in the future. It is a very simple matter to make WiFi access restricted but people refuse or don't know how to do it; the media grabs the issue and puts a panic-like spin on it. Thus far it is something to keep an eye on.