EB64 can be broken via a controller with an extended range joystick... which, interestingly enough, is competition legal
I personally consider that cheating as it cannot be done on an official console with official controllers, but whatever...
I do consider it a noble goal to play without glitches, and if you're interested, I'd fully like to compete with you one your grounds (to help you push yourself harder and to prove myself to you)
Also, it wasn't intended to be able to gain speed by hitting a slope... the ORIGINAL INTENT of that was so that you can't backtrack up slopes, or so that when you jump on them (from that lower position) you get thrown backwards...
The interactions with the wall are, as I said, intended physics, but when you can get inside the wall, they work for you instead of against you.
Also, in S2B, they did look at fixing all possibility of zipping by making you bounce off a wall when you hit it... however, they saw that this detracted from the game too much.
Regardless, you're saying that how the glitch comes about has nothing to do with whether you deem it a glitch or not... you base it off the effects, which would also be fair if it wasn't subjective...
As stef said, if I use your logic, all glitches are based off intended physics being abused in unintentional ways...
I remember when I first came to TSC I saw the S2 run of OO1 and I thought "That's cheating!!"... I realized later that it's just because the game was programmed poorly that these things were possible...
If you think of it as spitting in the face of the developer, so is speedrunning in all it's forms... walk through S2 and tell me it's not beautiful... or go listen to the music in levels all over the place... some is serene, some is upbeat... to only listen to the first X seconds of those tracks is kinda sinful...
But we're not an artistic appreciation group nor a musical appreciation group... we're speedrunners...
pro competition (for cash) usually doesn't bar any tactics... I would write more, but my gf is wanting to watch some stupid fucking WoW video...
off for now... ^_^