The idea is to encrypt about 1% of every laptop with a random password, thus 
rendering that 1% of the disk useless to the user. It would be possible 
however, to re-encrypt this with a password you choose and actually store 
things in it.
This means the 90%(or whatever, probably even more) of the people that don't 
need plausible deniability can't use that 1% of their disk.
The other 10% can set a password and store encrypted data in that 1%, but now 
they can just say they never used the encrypted 1% of the disk, thus don't know 
the password.

At the moment people who install encryption software can't really deny they're 
using it, otherwise, what would be the point in installing it?
I'm not saying I really like the idea of everybody sacrificing 1% of their disk 
space just for the few people who want to encrypt <=1% of their disk though.

Instead of disabling 1% of every computer, how about encrypting every laptop(or 
make it an easy/default option during install) with something like truecrypt by 
default? This would mean everybody has their data encrypted, which might be a 
good idea for laptops anyway.
Then if you needed extra secrecy, you could add hidden volumes, but have real 
plausible deniability for those, because lots of people already have encryption 
software installed by default.

-- 
General "rubberhose" vulnerability
https://bugs.launchpad.net/bugs/148440
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