They were useful in constructing hyperspace-capable vessels, like the experimental Hith craft Skel'Ske, as icarons "preferred" to be in hyperspace; there was a much smaller energy demand placed on a ship when it entered hyperspace and took no energy to remain there. Most societies banned the development of icarons because they caused paranoia and psychotic behavior in carbon-based lifeforms. They were prohibited by the Fourteenth Resolution of the Armageddon Convention. Individuals who underwent a body bepple were particularly at risk. (PROSE: Original Sin)