You don't know who's popular?
The Reputation System will help!
Reputation goes by levels...
Level 1 - 10 Reps
Level 2 - 20 Reps
and so on....

Rules:
Alt accounts can't rep each other.
Anyone who has a lot of rep immediately and many people don't know him, the person who rep'd the person has to be asked some questions.
(Multiple players at a time) Without the person(who has a lot rep and many people don't know him) leaving.

Example Question:
Why did you rep him?
(This question will be repeatedly asked to everyone who rep'd him over and over again...)
(There will be people examining the answers.)

There will be a crown on the popular knights.
(Level 100 (Bronze Crown) Level 500 (Silver Crown) Level 1000 (Gold Crown) Level 10000 (Diamond Crown))

Trade Reputation!
You can use 'inspect' to see the trade rep.
(This CANNOT be turned off by 'disable full inspect!)

Trade reputation is needed to see if the user is a scammer or not.

And also Guild Reputation.
Popular and Infamous guilds!
Popular guilds will have a star next to their guild name while infamous guilds will have a cross symbol next to their guild name.
Guild members CANNOT rep their own guild!

Guild Reputation will have levels too.
Level 100-1000 (Silver Star)
Level 1001-10000 (Gold Star)

There will also be negative rep...
Level -1 (Infamous)
Level -2 (Avoid)
and so on...

That's it, feel free to add any suggestions to the reputation system!