In my reputation list, there is an odd entry:
-65 18:42 removed User was removed
What doest this mean?
Why am I down 65 rep.? I'm curious how I can find out what happened and why it costed me reputation?
There's a lot of discussion related to this in the chat room on 22nd June 2012 which you can follow through. It started off in the question on unusual means of public transport. Michael posted an answer and apparently user 'user766' posted the same answer. According to the timestamps, user766's answer was posted after Michael's and for this reason I downvoted the latter answer commenting that it was a duplicate.
user766 believed he posted the answer at least a day earlier. What I believe may have happened (and I mentioned this to him on chat) is that he may have typed out an answer and for some reason either forgot to submit it or for some technical fault, it didn't get posted and was saved as a draft answer instead.
Anyway, on seeing the downvote, user766 believed that the moderators 'censored' his answer from appearing in the first place (we have no such capability) and then after censoring it, I downvoted the answer.
user766 got angry at this and started vandalising his own questions and answers, replacing them with lorem ipsum text. After five edits, StackExchange's vandalism countermeasures kicked in and prevented him from making edits. He then started raising multiple moderator flags to delete his answers, additionally, he also started downvoting, commenting, and vandalising other questions.
Mark Mayo and I discussed this situation in the moderator chat room and based on advice from other moderators + StackExchange employees decided to suspend his user account for a week. user766 then came to the chat room and requested his account to be deleted. We honoured this request. According to StackExchange's Terms & Conditions, the content that he wrote remains, but attributed to an anonymous account.
As a result of this, any reputation that users on Travel.SE have from votes by him were deleted from user profiles.
Hope that explains it!
EDIT: There's an explanation on Meta StackOverflow on what happens when a moderator deletes a user.