It seems you can't read, so Im not going to discuss this further with you.Ok, now you surely are trolling, right?
Because there is no difference between someone getting an item via persoloot who than keeps it (although in your words, he doesn't need said item), or someone rolling need for an item that IN YOUR EYES is not needed. At the end of the day, it's not your decision to make if someone else needs an item anyways, they helped down the boss as much as you. And they don't take away any loot if they press need, not more than with perso loot anyways. Atleast with group loot, you can't get the same item twice anymore.
Stop being entitled, you are not the loot police. And Blizzard already has a mainspec > offspec > no need prio system with their new rolls anyways.
Oh also, just because people are currently playing spec X doesn't mean they don't want to actually play spec Y, or plan to do so but need a certain weapon first, that's why they have the mainspec / offspec system. You know, people are allowed to play more than one role ...