I'm pretty sure 90% of these posts gave you your answer, your question was answered in the 2nd reply.People are asking justified questions, as you said it's a open forum, everyone is entitled to an opinion.
Curious, what do you call the red line then?
I call it the line of red, as that's what it is. Careful of the moving one, as that's just the needle, that tells you the important bit, like when it gets close to the rev limiter line, which is red.