This text is called a title. The standard titles have Middle-earth themes and change based on how many posts you have. The titles are just for fun and have no impact on your user privileges or status. Here are the titles:

• Sapling: 0-2 posts
• Hobbit: 15-49 posts
• Enting: 50-99 posts
• Elven Warrior: 100-499 posts
• Elf Lord: 500+ posts

The default titles for moderators and administrators are "Huorn" and "Ent," respectively. Staff Members and Elf Lords often have custom titles. Staff members will always keep "Administrator" or "Moderator" in their titles, however, for easy identification. In some situations, the title "Smelly Orc" is given to spammers.