Need help on this info , i can need items for disenchant?

Hi sorry for my english i am not native speaker on this language, so i play as fire mage on the realm icecrown and i have my profession "enchant" already 450 or max level, so the question is, i can need items like green or blue for disenchant for materials?, i was playing on icc rep farm and drop alot of greens items so i "need" it for disenchant and after that i got kick out, the raid leader told me i can't do this because i was wrong on need it.
So i want to know if i did something wrong on my behavior.

Don't need for disenchant. There's a reason why greed & disenchant buttons are on roll windows.

[Realm] Players Code of Conduct

Ok got it , thanks for let me know and sorry for my behavior.

Yes, you were wrong, you didn't intend to use them (for their primary purpose, wearing them) so you shouldn't have "Need"ed them.