An alternate LinkedIn game that I've done many times with colleagues (and which works better on the web/desktop UI) is:
* Ensure you have at least 50 connections
* Go to the 'My Network' then 'People You May Know'
* Scroll down and enjoy some of the ridiculous profile photos eg people at the horse races, photos with partners cropped out, weird off-camera poses, 1980s hair, etc
* Try not to laugh
Admittedly with the recent rise of 'personal brands', this game is more difficult than it used to be - yet still juvenile!
Also, what the heck is a 'thought leader' anyway? Isn't it better to be an 'action leader', a decision-maker, a publisher of some description; someone who does something or produces something meaningful?
Not all thoughts were created equal, of course, and there are not many 'thought leaders' on LinkedIn who were not self-appointed!
edit: fixed 2 spelling errors, formatting changes, added Quantcast reference for clarity