In my experience it is spread out in the sense that everyone does it. I get thrown around all over the place by pretty much everyone if it's a bad game. Certain players seem to do it all the time but I think that's just the people with the worst connections. I think ships that have high handling stats are worse, possibly because they can change direction more quickly and the game loses track of them. It's possible that some might try and take advantage of the phenomenon by sideshifting more around or into other pilots. But the way it appears on the screen to us is almost definitely not how it appears to the other person. In some cases where the thing happens that haiku describes, both ships could well be 'stuck' together, both losing a lot of shields. That kind of thing makes it pretty hard to intentionally ram other pilots, because the chances are you'll come off just as badly, or worse.