Blue flags on LibraryThing
Looking through my reviews on LibraryThing I found to my alarm that seven of them have been flagged as "not a review". I had no idea that this system was in operation, and no idea until I checked that my reviews had been flagged in this way; in addition, I would defend each of the flagged reviews as being very definitely a review - one of them is actually pretty substantial:

Actually *is* a review!

http://www.librarything.com/work/3093889/reviews/840956
http://www.librarything.com/work/11862/reviews/411717
http://www.librarything.com/work/115367/reviews/114931

Links to a review on my site or my blog!

http://www.librarything.com/work/4041453/reviews/114842
http://www.librarything.com/work/3116747/reviews/425710
http://www.librarything.com/work/3396/reviews/2191976
http://www.librarything.com/work/1386651/reviews/100281

It seems to me that the blue flagging system adds no value whatsoever to LibraryThing; the fact that you aren't told when your review has been flagged and that there is no apparent way of unflagging incorrectly flagged reviews makes it even worse. It should simply be scrapped.

Edited to add: Well, you can now undo a blue flag, which is better than nothing!