Something I witnessed on two separate occasions and that was ships going from Wanted to Clean suddenly. I was bounty hunting at a Nav beacon both times. A new ship entering the system scanned as Wanted. It managed to get out of my line of site briefly before I was able to fire on it. When i caught up with it, it was showing Clean. The first time it happened I just accepted it as me misreading the scan message. When it happened again another time, I started to think there is some sort of bug in the game or maybe server lag that is causing these issues. I only saw that happen twice but it could explain why I'm getting marked with bounties for killing ships that are scanned and showing Wanted. Whatever causes this issue is quite annoying and I agree with you on the accidental firing on NPC ships. At this point I have over 130 ships killed under my belt out of which two were both, Wanted and Clean at the same time