I'm not supporting his choice to combat log, for whatever reason. It's against the spirit of the game and is bad sportsmanship, quite apart from the fact that FDev have spoken out against it. I am however going to give the OP the benefit of the doubt and assume it's a poorly implimented protest against the problematic bounty system.
Again I'm gonna assume something here... I'm assuming you're talking about NPC pirates, as I've never seen a few hundred players of ANY sort in a single day, let alone a few hundred with bounties. Regardless, it doesn't matter whether only a few pirates do it or if it's all of them, the mechanic that allows them to easily clear bounties for murder isn't working, and the fact that they do it to avoid being hunted while mocking traders who go to solo to avoid being pirated is the height of hypocrisy, and it is just as much bad sportsman as combat logging is. This may be the mechanic as it was
implimented, but I strongly doubt that this was the outcome that FDev
intended, in fact I
know it's not, as DBOBE spoke in more than one video of bounties encouraging cooperative play and discouraging antisocial play.
Look how well THAT worked out.