In original Cataclysm, there was a hotfix less than a month after launch to prevent players without leveled crafting professions from seeing and rolling on Chaos Orbs. This restriction was removed in patch 4.3, when Chaos Orbs were changed to no longer Bind on Pickup.
Considering that Orbs are currently Bind on Pickup in Cataclysm Classic, this hotfix should also be in effect. Non-crafters should not be able to see or roll on Chaos Orbs.
https://wowpedia.fandom.com/wiki/Chaos_Orb
" [Hotfix] (2010-12-21) Chaos Orbs can now only been seen and rolled on by characters with a minimum skill level of 425 in Tailoring, Blacksmithing, Leatherworking, or Engineering."
I also found this https://forums.wow-petopia.com/viewtopic.php?t=7922
with reference to a Zarhym post where he specifically says this is a bug.
Please fix this bug so only crafters can roll on Chaos Orbs. Thank you.