Does anyone know if the 'bottle incident' was the start of this bad behaviour on both sides, or was there something prior to that?
If it was the bottle incident, Belmo should have not done it, as it was not the first time. Supposing that he had done it previously essentially automatically and unaware of it's disturbing nature, which is entirely possible, as we can all develop little habits that we're unaware of, which others can find very off-putting, then the first incident should have 'switched him on' to it.
The cracking of a plastic drink bottle can be quite loud and off-putting depending on the circumstances, and if deliberate would be very bad sportsmanship. The circumstances need to be taken into account.
Among spectators at a football match, for instance, - What noise?? Who would know or care?
When bowling, I have at times had completely unruly social bowlers, 'having fun' next to me. I can completely tune them out, and just do my own thing. I remember one league night in Lismore a few years ago, and 6 on next lane yelling at every shot, dancing at the foul line, and rushing past when I was 2 steps into my approach. I bowled three games over 230.
When bowling in any sort of comp, where everyone is doing all the right things,etiquette-wise, some sudden noise or movement , even on the periphery of my vision, often, despite my best efforts, sees me often miss my target by a mile. BECAUSE, UNDER THE CIRCUMSTANCES - I'M NOT EXPECTING IT ! It's a lot different from the football match situation.
That being said, the PBA could'nt extract anything from this if both, or indeed either of these people decided to act like adults.
And, if onlookers ( like us ) decided to try to judge what's happening on the basis of the best information available, and not on the nationality of the players, we would all be the better for it.