Another daft question....

[EI_Sparks]

No, what you really want is a redundant system, so we'd have the words "If you can read this, I'm going to crash" painted on the underside of the wings, a "Look out below" banner in a dragchute-style container on the tail, a big red flashing light underneath the plane (oh, hang on...) and a great big loudspeaker/claxon affair.
Mind you, that's so much drag that you'd probably never get out of ground effect, so viola! It works! You'll never get past the trees at the end of the field, so you'll never crash into Joe Public