No one’s perfect, but PPRuNe comes close. By being open to more than just professional pilots, and being very intelligently moderated, it’s become a very influential forum — not many industries are as well served. Lots of people other than pilots have an interest in professional aviation, and PPRuNe meets their need rather well. Yes, some contributors lower the standard, but I know of few anonymous forums on the Internet that are as sensible, informative, intelligent, informed and balanced as this.