Basically by repeatedly jumping up against ledges of bricks at different positions and angles sometimes you'll jump up one of them. It's easist to do against a corner, obviously.
removing corner humping would make the ninja challenge unbeatable, iirc there's a segment in there where you take advantage of corner humping
instead of not leaving a bug unfixed to cater to a select few builds, the bug should get fixed and those builds should be changed to not rely on bug abusing.
you've got a point actually, there's not many builds that rely on this bug
It's less of a glitch and more of a fun oddity that can add a new level of skill to gameplay if used right. I see it being used all the time.
Now go back to Gunz.
the ones who say they like corner jumping, go make a map that is meant to have natural boundaries that players can't get over, then come back and say you still want corner jumping