Do you often get hooked on one subject and have trouble moving on?

It's the OCD.  It's a horrible disease to have.  But it can be treated successfully with cognitive-behavioral therapy.  There is help out there.

If one waves the white flag, that means they've lost.

When you have someone who MUST get in the last word, then the winner is the person who leaves.  And why must a simple discussion on a bulletin board, be a win/lose situation?  It's just a discussion for god's sake...not life or death.