Greens, lockboxes and other items that aren't upgrade for anyone should be greed only. As you can see from the ticket response "needing uncommon items is not a bannable offense". It used to be until a week ago. Yes it is petty to get someone banned for green items but no one like players that need on greens. Once players find out they can't get banned they will need on everything. And if someone gets vote kicked from RDF for needing on greens, would the other 4 players get banned? Too much drama.
Players shouldn't have the option to click need on green items:
In RDF groups HC and normal dungeons with gearscore requirement (FOS/POS/HOR nm)
Raid instances (group loot)
Lockboxes are not upgrade for anyone and can be mailed to a character that can unlock them
OR
All classes can need on all green items without any restrictions. For example a warrior should be able to click need on cloth and a mage on plate.