R v.Lambert House of Lords and RIP reverse-burden-of-proof

[Adrian Midgley]

From: Owen Lewis <oml@eloka.demon.co.uk>

>> sending him some enciphered material (having created
>> a key in his name which I later discard).
>
>This is one reason why PGP as 'strong cryptography for the masses' is
a
>flawed system. You would not be able to do this to me or to many
others,
>only to those who lay themselves open to this form of abuse.
>
>Owen

That appears to be trivially easy to do, to me.  What am I missing?