hi AKA(sounds like juditsu!),

Cute suggestion,but the little doorknob on the trap door might be irritating...guess you could recess it( have tea and cookies at the same time) The cloth could slide under the strings and drop down(adventurous types that they are).You could entice the picks to jump into the `net' by lighting a match and yelling `fire,fire...jump,jump picks jump'as you tilt the guitar up.