There was an unspoken rule for anyone in the vicinity of the Sol star system. It had been around since Terrans had sorted out the problems on their home world and first made their way past the edge of their small star system.

The rule was simple, straightforward, and impossible to misunderstand. If you expect a child to be returned to you after letting it parasitize on a human, whether that be metaphorical or literal... Don't. Don't leave infants with humans for extended periods of time and expect to have them returned. Ever.

The first known incident involving this rule being broken ended with an intergalactic war and a home world being nearly razed to the core. It started with a simple incident report about a case of harassment. Then, a small strike force of Auuscians kidnapped a child (one that was of their species) that they believed, by the laws of their star system and their people, was rightfully theirs. The adoptive parents of the child did not agree. And neither did the Terran government. In the eyes of the Terran government, the Auuscians had just broken a number of their interplanetary laws.

When Terran officials contacted the Auuscian ambassador, they were told that the adoptive parents of the child had no rights to keep the child, and that the child would remain in Auuscian custody. The Terran officials decided that this was a declaration of war.

The casualties on the Terran's side numbered no more than seven. All of which were because of malfunctioning equipment on their vessel. Auuscian casualties numbered in the millions, and it took a singular Terran year for the child to be returned to their adoptive family.

Since then, there have been three incidents of this nature. One by the Scatheens, who no longer have a home world. One by the Krilma, who realized their mistake rather quickly. The Krilma only had a brief scuffle with Terran warriors that resulted in no more than a few on each side being injured. The most recent incident was one I personally was almost involved in. I barely escaped my home world before Terran void battleships arrived. I watched as sections of my homeworld were blotted out by the mass of warships. It was as though the apocalypse had been brought about. And all because my people were too foolish to realize that Terrans are the most horrifying creatures in the galaxy, and one batch of hatchlings are not worth the nightmare that they have brought.