Thoughts on karma system

Here's the idea: do good to other players, get +ve karma. Do bad to other players, get -ve karma. The game then should match players with similar karma values.

It feels bad when you're just trying to loot and farm arcs but constantly feel anxious about other players who will kill you at first sight.

It feels equally as bad when you're looking to PvP but everyone else just wants to farm and loot.

I feel like this makes sense to me. Nothing stops you from killing other players when you have +ve karma, you just reset to 0. And likewise you can climb your way back up if you decide to stop doing PvP for a bit. It's a good alternative to the "only pve mode" solution people keep suggesting.

What are your thoughts?