It's possible to get the gold armour without block glitching, but it's really hard to get all of the armour out of the chest before you hit the ground so the parkour would normally have to be done a couple times to get it all out. Though the first time I opened the chest, I landed somewhere I could keep it open from the ground. No idea how that happened though.
It's also possible to get onto the mushroom (in one of the back corners of the lobby) without block glitching if you jump from the training ladder, myself, @
Boboaluitz and several other people have done it.
Figured I would say that, though it may not be completely on topic
You can report people for block glitching with screenshots as long as you have a picture of them getting to the inaccessible area (it has to be sure that it's completely inaccessible using any other methods probably), or of them standing in between the 2 blocks sort of like spider hacks. Not sure if seeing them break the block counts or not. And not even completely sure about this, but mods normally kick people for just that