Digital Hazard

The Digital Hazard symbol appears on the bodies of certain Digimon. According to the series Digimon Tamers, the presence of this symbol means that the Digimon has the potential to be highly destructive, and, if corrupted, could threaten the very existence of both the digital world and the human world. The symbol bears a striking similarity to that which indicates a biohazard.

Digimon who are known to possess the symbol include Guilmon (and most of his respective evolutions), Lucemon and MirageGaogamon. Funnily enough, all these Digimon have featured as major characters in the Digimon anime.

Also some believe that the Hazard is actualy the equivilent of the auto delete for the digital world.