Answer:
I am a protector of the scoreboard.
Tear me off and scratch my head, what once was red is black instead. What am I?
Part carbon part water I am poison to the fishes. Many falsely claim my name I am the pause that refreshes.
I hold two people together but touch only one. What am I?
I go around in circles, but always straight ahead. Never complain, no matter where I am led. What am I?
The answer I give is yes, but what I mean is no. What was the question?