Easy. Ignore them! I also think of them as the detectable (but not visible) pulse of power that emanates from psychic people in my world.
And at least they aren't psychokinetic ectoplasm.
Oh, trust me, I'm ignoring them so hard. I was just a little disappointed by the art because I was really, really hoping more art in the style of the Expanded Psionics Handbook, which has some of my favourite art I've seen in a D&D book ever.
I guess from now on I'll be mentally replacing every picture of a battlemind I don't like with that badass-looking psychic warrior chick with a crystal sword from the XPH.