I am torn. Sure, he screams when HIS point is over. If he is the only one playing, perhaps acceptable. But would you like to play a competitive match on the table next to him, when you have no idea when his outbursts are going to occur? Do you get a let???
Well again, I could push forward zyu81's approach here, as well as the martial arts analogy. Self-control and, if anything, learning to turn the tendency of your opponent to over-react against themselves. If a player gives all he has in his lungs after any given point, I am tempted to interpret it as though he has given everything he had in terms of skills. High motivation for me in the next few points to whack everything back into him although, most important of all, not ever showing any sign of being affected. If successful in the attempt, those players can collapse rather quickly. The whole affair requires practice however, natural temperament only takes you so far and it is probably necessary for most people to go through a number of infuriating losses against the likes before developing the right mindset. Again, in my case I had done this kind of work in judo mostly, where you quickly learn to detect any sort of unsteadiness in your opponent and exploit it (hardly ever any second chances in that sport either, plus it is physical and in direct contact, so focus and adrenaline will naturally tend to be high - either you learn to cope or you bail out, but you don't get to whinge). A most helpful ability in life, which I actually feel I have lost to an extent and I am strongly considering going back to this kind of activity. Also taking this point to an extreme, as you mention the possibility that the primadonna is not playing against you but at the next table: you don't get to complain that you were distracted by a bombshell landing close to you, on the battlefield. You either just keep to your objective, or you are lost. Speaking as a pacifist of some sort, but you get my point.
Now, two things. I don't believe Harimoto belongs in the category of players I have described, nor does anyone at that level. But the other thing is, everything I have mentioned here is from the practitioner/competitor's point of view, and may be achieved through self-discipline and a very conscious approach as to what is going on.
While the general environment in martial arts tends to nurture this kind of growth and mindset in a, should I say, "organic" manner (that is, even if you don't think hard about it), TT seems to be going in the opposite direction these days, in keeping with the overall social environment which is moving towards epidermal and overblown reactions (a most gratuitous and assailable generalisation, I know). That is what I don't like, not only does it promote the opposite of what I believe to be the correct long-term approach, it makes us look like idiots while we are at it.
