Fixies v2 (merged into Core r635+)

[xoft]

I was thinking the same thing, but then I realized - sometimes there are situations where you don't want the default behavior. For example, an admin might want to be able to place blocks anywhere, even when there are other players occupying the spot. So it kinda makes sense for the functionality to be modifiable. And the Core is distributed and set up by default, so it should be pretty okay.