Are you confused? If you really didn't give a fook, you would not feel the need to let somebody now. If you have the urge to consciously respond to a stimulus, that means that stimulus triggered and cringed you enough to reach your frontal lobe, and caused you to formulate a conscious response to it.
This is especially true when nobody asked for one's participation. If you had not responded, I wouldn't even know you existed, and so, I wouldn't have the stimulus to trigger me to respond to you.
The moral of the story is; if you don't care, then don't engage. Especially, when your input was not personally requested in the first place.