i think it is humans in general pushing the limits of what others will take. we are invading thier territory, slaugherting them by the millions each year, fishing out the only source of food that they have, if i were in a sharks shoes, i`d be mad too. in general human population is taking over and dominating everything and we never learn to leave things as they are and just admire them from afar. now -- this is not to say that we have no business in the water, but humans must learn respect for the things around them.