Why can Karma shield Creeps???
I've been playing a lot of Karma recently in the support role, I can't think of a reason why you would ever want to shield a minion. It only seems to screw me up. For example, my Caitlyn (or whatever ADC I'm laning with) is about to die and is ignited. I try to shield her, but she's running through a creep wave and I accidentally shield the cannon minion that's walking right on top of her model. She dies, and now she's raging at me or typing "..." or whatever, and I'm left thinking, "Why am I able to shield those in the first place?" This happens to me all too often and when it does I always ask myself that same question. It's a small complaint, but I really think it's a useless feature to Karma's E that should be removed.
or Voidlings from
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As you can see there are plenty of possible situations where shielding a non-champion can be very usefull.