A lot of "rudeness" appears to me to relate to photography. Back in the day--before digital photography was common--having a photographer in the group was uncommon. The people with cameras were the ones with thousands of dives. Now that everybody (except me, it seems) fancies himself a photographer, I sometimes find myself in the midst of a group of people all jockeying for position. And many of them are not skilled enough at positioning themselves that they don't end up annoying the others. They are literally falling over each other. I try to stay away from photographers. When I'm a skilled enough diver to take on the additional task of handling a camera, maybe I will get into photography.