Is the photograph (PGF) real? The photographer says it is, and to say otherwise is to call him a liar. Naturally, he is sensitive about the careless use of that word. What's more, he's getting a little testy about it, because he's been questioned by both believers and disbelievers several hundred times, and he's tired of it.
A lot of people, including some of the press and some scientists, think he's at least obsessed, and maybe a fraud, too. Some have flatly stated that he's a liar. A few people believe in Bigfoot, and in what Patterson has been- is- trying to do. The press and the professionals usually think they're nuts, too, by association.