Examples of Unwarranted Self-Importance on Wikipedia
Basically, most Wikipedians are guilty of unwarranted self-importance. The mildest cases are those who think their edits are actually contributing significantly to an encyclopedia. Jimbo-christened administrators have unwarranted importance, but it may or may not be self-importance, since Jimbo seems to think them important (or more important than other peons Wikipedians). The worst case of unwarranted self-importance are those Wikipedians who have not been Knighted by Jimbo, but pathetically, desperately want to be, like this guy, so they actually start sycophantically acting like administrators,in the hope that their "initiative" will be noted and rewarded. Here is an example of Jaysweet's self-importance:
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Hi, if you are reading this you saw that I am helping out at the administrator's noticeboard, even though I am not an admin. I believe what I do is useful, and I will continue to do so unless/until an admin asks me to stop. I created the disclaimer after a user became frustrated that he had filed a report and a non-admin had responded. I think I was helpful in that case anyway, but in the spirit of full disclosure, I now often let people know as soon as I answer an ANI report that I am not an admin, especially if I believe the thread will eventually result in admin intervention.