How is getting a random implant drop from a corpse any different than getting a random faction drop from a blown up ship?
Everything in Eve eventually blows up.
I mean seriously, someone gets a low-grade talon off of a corpse, either he will use it and eventually lose it, or he won’t. The fact that the original owner lost it and will attempt to replace it does not change.
Anyways, if you don’t want to lose your implants then don’t fly with them.
Also, doctors in the medical profession regularly suck the fat from female asses and inject somewhere else in their body for a fee, so if we are keeping it real, then removal and sterilization of an expensive implant would require a level of high technical degree which would have to come from a difficult to acquire location. So lets say in order to learn the Skill: “Body Harvesting” one would have to go into unknown space and do some unknown things to get the skillbook.