Dick, unfortunately Quora really shouldn't be treated as a key source of expertise as it lets anyone answer any questions, with the only requirement being a real name for their username (which can be faked). There's the ability to upvote answers or writers, which helps to some degree but there's still no real guarantee of accuracy - as you've seen, anyone with a CPL can list themselves as an expert, and if you look through some of the military questions the answers are clearly written by people who get their expertise through Call of Duty on the XBox - some of them are also still in their early teens, which seems a bit young to have their claimed years of special forces combat experience
There's also quite a few "experts" who write authoritatively on numerous topics, listing their expertise in fields that would take several lifetimes to accumulate...the Special Forces soldier/CIA agent with the expertise in nuclear weapons, hand to hand combat, billion-dollar business administration, submarine warfare and computer hacking...luckily that's entirely unlike any Rumour Networks for Profeshionull Pilots!