I would have thought that any unexploded munition was potentially as dangerous as an unexploded cluster submunition (obviously with variances down to the style of fusing, etc). Also, the only cluster munition (display models) I've ever seen were painted bright colours, as they were intended to be a dissuasion to go somewhere rather than an unpredictable danger once you had.
It strikes me that this is two separate issues. Landmines are fairly horrible, though. Don't know if anyone saw the Palin, but you really shouldn't have to have landmine safety classes in your junior schools.
Phil