Oh, and the wifi thing is big trouble because its considered 'unauthorized access to computer systems'. Federally (and in most states) it is punished by laws written when only banks/defense/etc had "computer systems", by people who don't (and didn't) understand them. So (especially in a mandatory-sentencing area) you can get more time for using the neighbor's wifi without permission than for breaking into their house and robbing them..
(ETA: For a recent, tragic example, look up the Aaron Swartz story. He was
threatened with decades in jail for downloading free documents he was legally allowed to access and publishing them, which was also legal. The federal DA ran him so hard he ended up committing suicide rather than risk going behind bars for decades.)