to the original poster: you've probably been around the block enough times to know that there are great people (and not-so-great people) in every industry and every walk of life. Chalk up your experience to maybe a guy not having a great day prior to the game. You don't know what his deal was prior to showing up to the game. Benefit of the doubt. Move on.
I've shot our local HS team for 2 years now. I don't know on a personal level the guys who shoot for local publications, but I see them regularly, recognize them and respect their job and space. Last Friday night there were two guys shooting the field in advance of this Thursday nights game that will be televised on the local Fox Sports Network. The still photog guy and I were both walking across the end-zone as the home team had a 1st and goal from the 6 yard line. As we were walking across the back of the endzone, I see the guy was setting up for a play to the left. I look at him, make eye contact and I'm motioning with my head and eyes like, 'over here, over HERE.'
He gets the point, joins me on the far side of the endzone. I say, 'they'll run this side twice in a row.' First play results in a TD and the guy gets shots of the featured back running right at his lens. Gets the shots of the other kids mobbing the running back, etc.
He gets up, thanks me, made sure I got the shot as well, hands me a business card and tells me if I ever need anything to give him a call. He knows I'm not doing this for a living but that I provided him with some 'local knowledge' so he could make his.
Not sure if it's how each of us chooses to interact with people that determines or even PREdetermines the outcome, but thankfully, in shooting sports for 2 years now, I have yet to run into a negative or unpleasant encounter with ANY photographer at the same event. Oh ... except for the self-proclaimed professional photographer who doesn't show up anymore because I've 'stolen all her business!!!'