Well the ev thing is actually exposure compensation. You turn it down, you'll get darker images, just like digital cameras. But the digital cameras do this without you knowing. For the DSLR, it just changes the reading in the lightmeter, which in turn changes the shutter speed, ISO and Aperture. Not much of a difference than setting yourself. The only way I can think of is to Photoshop it, compose your image such that it won't be shown, or if you want something more exciting, saw off the light source =D I usually use M mode to remind myself of the control I have. My friend who uses P mode always complains about blur images, but comes to his senses when I told him "increase shutter speed". Of coz, use some other modes like A or S if you don't have the time you need to set, like in events when the lights suddenly switch off
