There are days when I get PKed more than 50 times and I kid you not, I started counting. This most often happened at blazing swamp when I was lvling my mentee, but I often get Pked in other places as well, for example when someone wants to take over my spot.
Thank you NC Soft for ruining the PK system which worked well for so many years. Not only PK does not result in anything negative for the PKer, but also they can remove the red color in a few seconds by killing one or 2 mobs, so even when you attack them, you get automatically flagged... and killed again, this time supposedly via pvp.