Do you password protect your wireless?

If not, read this AP's article: NY case underscores Wi-Fi privacy dangers

BUFFALO, N.Y. – Lying on his family room floor with assault weapons trained on him, shouts of "pedophile!" and "pornographer!" stinging like his fresh cuts and bruises, the Buffalo homeowner didn't need long to figure out the reason for the early morning wake-up call from a swarm of federal agents.
That new wireless router. He'd gotten fed up trying to set a password. Someone must have used his Internet connection, he thought.
"We know who you are! You downloaded thousands of images at 11:30 last night," the man's lawyer, Barry Covert, recounted the agents saying. They referred to a screen name, "Doldrum."
"No, I didn't," he insisted. "Somebody else could have but I didn't do anything like that."
"You're a creep ... just admit it," they said.
Law enforcement officials say the case is a cautionary tale. Their advice: Password-protect your wireless router.

Read more at http://news.yahoo.com/s/ap/20110425/ap_on_re_us/us_wi_fi_warning

According to a blog written by Dancho Danchev posted at ZDNet year ago: Wardriving police: password protect your wireless, or face a fine

Internet users in Germany, whose wireless networks are left password unprotected, can be fined up to 100 euros, according to a recent ruling by Germany’s top criminal court.