[jvriezen]

For situations like this, it would be good to have some type of 'horn' (like a dump truck backing up) that would sound prior to the action to warn at least those familiar with the bot that something might be about to happen.

I'm thinking such a device would be good to put in the KoP with instructions to program it to squawk prior to potentially dangerous actions (at least when not connected to FMS-- i.e in pit, shop, demo, etc.)

Even better would be something that could also vocalize a fixed/programmed/recorded phrase : "Caution, stand back !"

Granted, programming errors may risk that you don't always get a warning, so you do run a risk of a false sense of security, but I think, on balance, such a system would be helpful, especially for games where there is high force actuators or harmful projectiles like frisbees.