There is an old Japanese proverb that goes, "Better than a thousand days of diligent study is one day with a great teacher." This week's mail is all about teaching. Whether it is about the seriousness of psychic ability, a short history of trolls or explaining how much free time and malice your dad's attorney has, these people just want to impart information. If what they sent me is any indication, they had a lot of sick days. Click on the link below to become enlightened.

Because the number of abductions in Mexico has jumped almost 40% in the past 3 years, the wealthy are getting subcutaneous transmitters so they can be tracked when kidnapped. Xega, the Mexican security firm which makes the chips, has seen a sales jump of 13% this year. The company injects the crystal-encased chip, the size and shape of a grain of rice, into clients' bodies with a syringe. The chip then sends radio signals to a larger device carried by the client with a global positioning system in it. A satellite can then be used to find the location of the missing person. Things must be a lot worse in Mexico than I thought.

In this week's Disagree Mail, I try to show the range of messages I get. It's not all angry or insane, sometimes it's sent to us for no apparent reason. We start off a little mad, slip into a whole bunch of crazy and finish with someone who has a complaint about racism at his favorite restaurant. Read below to get started.

mytrip and several other readers let us know that a judge in Boston has lifted the gag order — actually let it expire — against three MIT students who discovered flaws in the security of the local transit system, the MBTA. We've discussed the case over the last 10 days. "Judge O'Toole said he disagreed with the basic premise of the MBTA's argument: That the students' presentation was a likely violation of the Computer Fraud and Abuse Act, a 1986 federal law meant to protect computers from malicious attacks such as worms and viruses. Many had expected Tuesday's hearing to hinge on First Amendment issues and what amounts to responsible disclosure on the part of computer security researchers. Instead, O'Toole based his ruling on the narrow grounds of what constitutes a violation of the CFAA. On that basis, he said MBTA lawyers failed to convince him on two points: The students' presentation was meant to be delivered to people, and was not a computer-to-computer 'transmission.' Second, the MBTA couldn't prove the students had caused at least $5,000 damage to the transit system."

German police have confiscated the world's fastest office chair and arrested its 17-year-old inventors. The duo added a lawnmower engine, brakes and a metal frame to the office chair and were reported to be driving it all over the streets of Gross-Zimmern. Police did not comment on the chair's handling or acceleration but I look forward to it being profiled on Top Gear.

nerdyH writes "The Debian project's maintainer, Luke Claes, announced in an email Saturday that he will freeze the 'testing' or 'Lenny' tree, in preparation for a new stable release of Debian Linux in ... September! The freeze means that open source software developers have only a couple more days to package any applications that they want to be included in the next release of Debian — and by extension, in the inner sanctum source lists of distributions such as Ubuntu that are based on it. After the freeze starts next week, Debian maintainers will turn their attention to 364 release-critical bugs, and half-a-dozen high-priority goals. Given the work to be done, is September really feasible? Lenny always was a little slow getting back to his right place ..."

John Hawks writes "A new genomics study in PNAS shows that humans have been evolving new adaptive genes during the past 10,000 years much faster than ever before. The study says that evolution has sped up because of population growth, making people adapt faster to new diseases, new diets, and social changes like cities. Oh, and I'm the lead author. I've been reading Slashdot for a long time, and let me just say that our study doesn't necessarily apply to trolls."

An anonymous reader writes "It finally happened. Steve Jobs announced an iPhone SDK today. The plan is to release it in February, and the suggestion is that apps will need to be digitally signed (not unlike digital signing in Leopard). Here's hoping that developing for the iPhone/Touch will be cheap (or free) enough to allow the folks who have been writing apps to continue doing so. Says Jobs: 'It will take until February to release an SDK because we're trying to do two diametrically opposed things at once--provide an advanced and open platform to developers while at the same time protect iPhone users from viruses, malware, privacy attacks, etc. This is no easy task.'"

Techdirt is reporting that the Video Professor Company is suing 100 anonymous critics of their company. The Video Professor is known for their television ads hawking DVDs that teach you various skills like how to use your computer. Most of the complaints center around how their "free" product offering automagically signs you up for a subscription. Instead of addressing the concerns the Video Professor has decided to take the litigious route.