+1 Truecrypt. However my fingers get the password wrong regularly, today for instance!
The reassurance it provides is very valuable, I have PCs laptop, netbook, ext HDD, and memory sticks all encrypted as confidential client data could be on any of them.
Prior to this I used regularly get in a funk whenever I couldn't locate a memory stick
There's a tremendous difference between expressing disapproval for what someone says and believing that they shouldn't be allowed to say it (insert not-actually-Voltaire quote here).
At the end you tend to re-invent the wheel if you learn that way. Learning about the existing wheels will save much time and correct a lot of errors that you might never even see when working that way.
And kids knowledge is generally supplemented by adults to complete the picture and sometimes we have to lie to introduce them to some concepts.
StackOverflow has its own deletionists now? Is there any other site that does?
I think now that it's happened to more than one online community, it's worth a lot of careful thinking to figure out why and how these communities develop deletionist subcultures.
I fly a paraglider which is essentially the same thing only unpowered. At around $10/hour it's within reach of most people. Takes around 7-9 days to get a restricted license in most countries. Then you just grab a friend, walk your back pack up the hill and, if the weather gods are agreeable, launch.