Really? Do you think it's incumbent on us to evangelize?
No. But stamp collecting is a hobby, so by comparing Aikido to stamp collecting you are implying they have the same merit, which I don't think they do. People in the Aikido community venerate O'Sensei as someone who has something to teach them about Budo and about life. We wouldn't be discussing O'Sensei if he hadn't of opened his own dojo and began teaching his style of Aiki-Budo. The fact that he developed Aikido and then gave the responsibility of disseminating his art to his disciples shows that O'Sensei believed in his life's achievement. He had an uncompromising conviction in the benefits of Aikido. I would imagine the majority of people that use these forums think Aikido an important part of their lives - that it is purposeful, not just recreational. I'm not saying we should be evangelizing the merits of Aikido, but neither should we feel the necessity to make it a clandestine act that we somehow try to avoid revealing to others.