So, some comments. Newbies tend to learn where to rank from groupmates that take them ranking in group. By level 49, people surely have learned that they cannot rank in one place forever. This started to become evident to me pre level 10, when I was solo-ranking with trogdolytes as my first character and noticed that I was getting less and less experience from killing them.

My advice to newbs is: Play one character to Hero and you have learned quite a bit about the game in the process.