Encryption wouldn't help if you're talking with an undercover agent; and if you sign it they'll will have further proof it was you that wrote it.
And moreover,if you're buying from a honeypot,you're done for.
So if I order a package on Silk Road and my mother signs for it, that means she bought it? And wouldn't that be entrapment if the police are claiming to sell fake drugs online?
You can go the police station , buy a coffee from a vending machine and throw it at the first cop you see , you'll get away cause it's the same kind of entrapment like on SR. They offered you the option of purchasing that damn coffeee...
What are you talking about? I don't see how assaulting someone with coffee applies here.
. 
