So they didn't see anything, as there isn't anything to be seen. Care to comment on what they did see? I've read WP:NPOV and it led me to this guideline on reliable sources: Reliable sources are credible published materials with a reliable publication process; their authors are generally regarded as trustworthy, or are authoritative in relation to the subject at hand. So it comes down to who is trustworthy and who is not. Is a bigfoot researcher in the field less trustworthy than a biologist who refuses to study the evidence?