The fact that a password can sit on a hard drive is really irrevelent. If someone has access to your hard drive, they might as well just set up a keylogger and wait till you access a bank account or something, that would be much easier than wading through hundreds of megabytes of swap. This security hole is almost completely irrevelent, the only time that I would worry about something like that is when throwing away a a computer (which should be recycled anyway). Someone interested enough could go through your trash, removed an old hard drive and start snooping around.
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... that 135kg is not 500lbs.
The fact that a password can sit on a hard drive is really irrevelent. If someone has access to your hard drive, they might as well just set up a keylogger and wait till you access a bank account or something, that would be much easier than wading through hundreds of megabytes of swap. This security hole is almost completely irrevelent, the only time that I would worry about something like that is when throwing away a a computer (which should be recycled anyway). Someone interested enough could go through your trash, removed an old hard drive and start snooping around.