There's room for all, and learning is both fun and life-long. You don't check your brain at the door as soon as you get your callsign. No one has to be Marconi, but we shouldn't create an atmosphere where Marconis are dissed as 'arrogant' and 'trolls'--just because they point out the obvious. The point is we should recognize the core value of knowledge we all acquire for the privilege of getting OTA, and celebrate that. Onno has the right ATTITUDE; Its the knowledge base that needs work--if he wishes to showcase to a large audience of radio amateurs. Nothing wrong with making mistakes, as long as they are self correcting, or acknowledge correction from the knowledge base of others.