Reason's I believe people ELO boost.

Here are the reasons I think people ELO boost.

1. People think that they are trash if they are not gold or above, Riot slightly reinforces this by only giving ranked rewards to people who reach gold or above.
2. They think that feeders and trolls will get better as they get into higher ranks.
3. They believe that the ranked system is trash and that they deserve to be higher than they actually are. But the most obvious reason of all Is that people don't want to get stuck with that dumpy silver boarder, like what is dat shiz its not even silver its gray :P