The reasons are obvious, you’ve made the point numerous times.
You are a troll.
Yeah, a troll. I got sucked in too.
Yeah, he is. I see dillweeds like that all the time. Usually you have to creep up in the right lane to pass them, because if you look as if you're going to pass, they speed up to block you. When the time is right, I spool up the turbo and don't give them an opportunity to block.
For all the left lane campers out there, here's a really simple logic tree for you to follow:
If there is no one in front of you, and if there is someone behind you, MOVE TO THE RIGHT. It's as simple as that.