I Said Stop...
Guided interdiction was a solution to the problem of polluted hyperlanes. Specialized drones referred to as interdiction buoys would be placed on the outside of the hyperlane. They would then match the speed of incoming vessels, harpoon those vessels, and slowly guide them out of the hyperlane. Once outside, the buoys will activate reverse thrusters at the moment of maximum velocity. Vessels traveling from place to place across such vast distances do not have their engines on constantly. This waste fuel and also builds up velocity which increases the time needed to slow down the vessel safely. In a hyperlane, the center most point of the lane is the point of maximum velocity. Vessels at this point will go no faster and start to decelerate when they pass this point. The drones take advantage of this. Because of the velocity of the vessel and the amount of harpoons attached to the hull, the slightest change in velocity can result in a successful interdiction, allowing those who staged the interdiction to board the vessel with no resistance. The sudden burst of deceleration is not designed to stop the vessel immediately. It is usually carefully controlled so that the ship is not ripped apart. The goal of decelerating in this way is to kill everyone inside. Imagine traveling at 2 kilometers a second. When the drones activate and decelerate the vessel, they only need to drop a fraction of this speed. For example, by decelerating to 1.92 km a second, everyone on board will be thrown forward at .08km a second. (252 Kmph) considering how compact the inside of a voidcraft can be, this means that the crew of The vessel will be thrown into the walls of the vessel or any other obstacles at rapid speed. Not a pleasant way to go.
The graveyard of bad days
The centralized star systems of the galactic community avoid a single hyperlane that was once a stronghold for pirates. These pirates build a space station just outside of the hyperlane's center point. They used inertial interdiction so often that the entire hyperlane has been rendered a ship graveyard. The graveyard of bad days happens to be the reason why inertial interdiction is considered a war crime. The hyperlane originally led to a star system that maintained a staggeringly successful economy for eons. When the pirates settled, the economy collapsed. Valuable goods provided by this system could not get where they needed to go. Things like medicines, food, and raw materials skyrocketed in price, assuming you can get them in the first place. Other forms of inertial interdiction have been used over the years, especially with the emergence of Higgstech. These other phones and addiction are not considered war crimes and are perfectly valid forms of attack.
With the introduction of warp technology, hyperlanes started getting used less and less frequently. Naturally, those losing out Rose to the occasion and developed a form of interdiction that interferes with warp technology, allowing them to stop any vessel in range. Warp technology involves altering space-time in such a way that the universe moves around you, as opposed to you moving through it. Buy a technicality, voidcraft using this technology rarely ever move, that is to say, they have no velocity. The kind of distance that can be traveled with this technology is mind-boggling. As luck would have it, a vessel that is traveling at what would be several times faster than the speed of light can be suddenly rendered to a complete stop and not kill the crew inside. This technology is incredibly advanced and as such, it is very rare. Interdictors can cut the head of a fleet off by separating large ships from their escorts. Small fleets can destabilize the military power of an empire with a single interdictor.