Regardless of whether or not one sees themselves as a melodramatic person who finds solace in releasing their troubles to others, or the inverse who find solace in the nearby dark corner, everyone always seem to have a degree of self-control that prevents them from doing or saying certain things impulsively.
Now I'm not saying that having more self-control is better: I think that unless you know how to fully accept the action, the more self-control you have can actually have an extremely negative rebound effect, in which you end up 'bottling' everything up and consequently 'exploding'.
It is during these times that a psychopathic creep would agree that not having any self-control is the best thing ever- it's one thing to imagine a variety of scenarios, but to act it out? The feeling of satisfaction might be so fulfilling that perhaps it outweighs the later consequences.
But really, what happens after? There's always a really fine line between defining how far one should go to achieve their means, or 'exploit' as such their emotions.
However, if there wasn't any self-control, I'm pretty sure the overall human population might be close to single digit numbers and decreasing- because there isn't going to be a person who you can't find faults with, and even if you manage to extract 'revenge', other people who opposed you will then try to do the same to you-- and so it's just going to turn out a bit like Hamlet-- everyone kills everyone.