I love pk'ing at all levels but I don't have the patience to find enough people any more to distend. When there's 3-5 other people in range for most of my char's life, I will still go out and kill them but I don't level SO slowly that I distend.

That being said, I totally feel like players that level without pk'ing the whole time will ultimately be considerably weaker and end up with fewer tools to deal with situations than they otherwise could have