This is a problem with all MMOs, not just STO. People will roll Need on stuff they don't actually Need - they just want it to sell.
Unless it's a game with a better system that doesn't use the needlessly complicated Need/Greed metric. CoH uses random drops for everything, and IMO was a much better than thissystem we have. No button clicking. No waiting for everyone to choose "Greed" before ripping them off with a "Need" at the end. Random means you get what you get and are free to sell/trade it after that.
CoH, as I recall though, has no actual "gear" concept. You get those kind of "buffs" that you can use whenever you need. So there's no reason to Need/Greed things. The problem with random in a gear-based game, is the randomly handing out might give you something that's completely worthless to you - and maybe it isn't tradable.