Re: When did you actually run out of fucks to give?
"Not giving a fuck" is not a virtue. It's more a question of, what is good and what is bad to care about relative to one's being.
Once one's energies are exhausted in dealing with a certain aspect of reality, then, one becomes cynical, thus, apathy, is a sign of chaos (i.e. a lack of inner control, harmony), over-stimulation, and fatigue. This is one way a cynical attitude develops: from inefficiency or exhaustion. Here, one's needs are not dealt with adequately. Keep in mind, those who, due to circumstance, "don't give a fuck" about whatever, did care - they were indeed effected by a specific stimuli . . . repression and denial is at play.
Rather than dealing with the effect appropriately, resulting in a different, more natural, honest inter-action, through a form of re-conciliation, it is minimized, blocked, and shut down via abstraction, that is an inherent falsity, leading to discordant and rigid behavior or cerebral dominance and bodily repression.
What is good and bad relative to one's self is never accounted for, leading to a (moral) regression and being self-centered. Further, "not giving a fuck", in reality, is not an overcoming of the other, as one would like to believe, but being overcome by the other, and diminished in spirit.
Tis' a false sense of power: look at all the modern rappers and their pretense of possessing power (where in reality, they've been thoroughly degraded in mindless lifestyles) - all their work exude a "don't give a fuck" and narcissistic attitude.