Accusations do occasionally backfire, with real veterans accused of being imposters.[21] Doug Sterner, a Vietnam War veteran who catalogs military awards, and Stolen Valor author B.G. Burkett, note that some modern veterans have become hypersensitive to imposters, leading to vigilantism or even turning detection into a "hunting game."[22][23] A common error is placing too much emphasis on neatness of a uniform or certain quirks about how it's worn, which is not necessarily compelling when a veteran is older and has been out of the service for several decades.[22] Another is making too many inferences based on older regulations, such as gender restrictions that were in place in the past.[24] Even FOIA requests to the National Personnel Records Center, considered the most thorough type of verification for US veterans, are not perfect and sometimes fail to find a record even if the veteran is genuine.[25] Sterner states, "There’s some people that feel good about confronting people, and making themselves look big by trying to take them down. But when they do that, they’re going to make mistakes."[23]