@fluepke If that doesn't make you an expert, what does? Have you tried?
Can't speak for the DID people because I dealt with another WG but I can tell you, they weren't exactly known to be very open either but I still got invited. Sometimes it's nice to be surprised. Not all people who work in such WGs are mindless sycophants which close themselves off towards critics, even if they work for a company or towards a goal with questionable ethics.