gravanom,
Clearly if I ignore you, you will see this as verifying your accusation.
In answer to your questions;
a. Because of the thread subject and our scepticism perhaps. Maybe you'll accuse me of being Michael Moore next.
b. Because it makes the post and therefore the whole thread more entertaining and pleasant to the eye. Were Salvador Dali, Pablo Picasso and Vincent Van Gogh the same person?
c. It encourages debate, albeit a little heated at times. Besides, it's a bitter world outside your window.
On your final comment, look at any thread where people generally agree one side or the other, and you'll end up with the same deduction.
Kindest regards,
SS