Stewey, I think you may be in danger of upsetting a few people. Although, I am in partial agreement with you. I think for some, this site is more than simply a Q+A forum it is part of their daily routine, some will log in for long periods of the day and treat it as a social aspect of their life. It is possible to form a "sort of" bond with people even though it is through a computer and we are, on the whole, strangers to one another.
However, it is still possible to become fond of somebody even though it is through their opinions, ideas and general outlook on life. I think you can get an idea what people are like by reading their posts, although I agree you can never truly know them.
How well did we know our favourite actor/actress that has passed, how well did we know princess Dianna and yet these people are mourned. Truth is if people want to mention an AB members passing and mourn this, they should be able to. I didnt know Owd, I didnt know he had passed until just now. But some may want to have a thought for him on the day of his funeral.