Its strictly a guess, but I think a lot of people are somewhat intimidated. All to often, on the internet, a person takes that plunge and submits their first post of their opinions. Then, inevitably they get beat up and flamed and discouraged.
The internet tends to be a harsh environment. Not so much on the cruise boards, but in a lot of other forums. People tend to be much more bold and controversial than they would ever be in person. A lot of times you find yourself embroiled in a flame war trying to defend your opinion, or worse, your likes and dislikes. It always struck me as being odd that I should have to defend what I like or dont like. But, it happens. Even here.
Ultimately, a lot of lurkers read these flame wars and just decide to opt out of any involvement.
I may be totally off base here, but its an observation that comes from years of internet surfing and participation in a variety of forums.
As a child, a library card takes you to exotic, faraway places. When you're grown up, a credit card does it.
-- Sam Ewing (Readers Digest, Dec, 1997)
Western Caribbean - Holland America Westerdam
Alaska Explorer - Holland America Westerdam