Jasede is right of course, but I will start this post by musing over some of the cultural conventions of lower levels of play. Namely, the ritualized battle.
In lower elos and among less skilled players, there is an expectation that a team battle has to take place, no matter what; and that if there is a lull in fighting, it is the responsibility of both teams to line up at a suitably neutral place and create a teambattle. We can see this in my descriptions of earlier games; in both cases, when the enemy was MIA the rest of my team instinctually went to the mid and... Well, not exactly roamed, rather just stayed there to wait for something to happen. We were outfarmed and outleveled by the enemy, but yet they all dutifully teamed up near the mid tower, waiting for... Something. Eventually they grew so tired of waiting that they assaulted the enemy team 4v5 (I was pushing top) near their tower.
I saw it again when I tried a couple of 3v3's today. Yes, I know, 3v3'ers are horrible creatures etc but bear on with me. In both cases the first thing happening was a rush to that bush near the bottom mid lane. I didn't much participate at first, instead going to the top and awaiting minions to kill. I was immediately called a n00b and pingspammed to go to that teamfight spot... This happened in both games, even when my two allies were nidalee and caitlyn and the enemies were all tanky deepses that could probably steamroll us, so I don't think we had much chance of winning that engagement.. In fact no sides tried much they were content to send snipes at each other until minions broke forth. But what struck was the regularity and regimentation of it; both teams went to this neutral ground, in spite of it having no strategic importance (unlike for example the blue buff that are sometimes fought over at lvl 1 in high level play) but yet they all went there, driven by some strange natural impulse...
We must keep in mind, however, that to them, this was perfectly rational; in fact, nothing else could happen. They are lol players, and lol players fight teambattles in the mid. Of course they react with frustrated aggression when something or someone does something that shatters this worldview, like splitpushing. We should expect them to lash out when something threatens their sense of self and the very idea of what they are.