>I suggest that the offender knew beforehand that he was
>going to murder John Ramsey's daughter and leave her in the
>house. For an unknown reason, the offender relished the
>thought of John waiting by the phone with his sack of money
>envisioning the terror and responsibilities ahead of him,
>all the while knowing JonBenet was dead and still in the house.

I, ofcourse, agree with that.
However, I am not certain about the use of your term 'control device'.

I would agree that he wanted the note to instill a viewpoint of 'we must get the money and sit by the phone'. It was still overly wordy for such a message, but that is the behavior he wanted.

Sit by the phone endlessly waiting for a call that would not come and going through pure hell everytime some darned telemarketer called.

Was this solely for his amusement or did he have to get someplace in particular before the corpse was discovered?