First, I agree that jumping, like all things, has a limit where it is no longer acceptable. For me, this means going under the map or shooting through caulked walls. However, I'll still argue that being up on a roof or somewhere similar and shooting people doesnt quite qualify for stat padding. You are still visible, and all the player needs to do is look around for you, and you'll be spotted a lot quicker than you might think. And as I've said before, once you've been spotted, the whole thing is a mess and that spot is unsuable for the rest of the map.

I played my COD on custom map servers so I quickly got used to all the forms of glitching and sure its annoying and cheap but in the end I became a decent player and learnt to counter all forms of it. So long as you have nades (even more so with cookable ones) and an aimable gun you could quite easily get your own back. End of the day getting to these tricky spots amount to the same as camping and its not hard to counter a camper seeing as they tend to favour the same spots throughout

Jump glitching can be fair/unfair, just depends on where this jump is. I do not have COD4, but in UO on Neuville there is one jump that gives u a view of both spawns. Weve had a guy go up their repeatedly and use the 30cal to shoot into the spawn, that type of play is sad and just shows your lack of skill to actually try to fight the fair battle. On another note this is just a game, and every server/person will deem what they think is fair. If a server is gonna allow it then Ill get up in the obvious jump spots.