Ditto +1. I've done it (grab it like superman unbending a steel bar and pull) for slight spreading (4 or 5mm) just to allow an easier squeeze, but forks are dangerous things to compromise. Then next time you're in tuck going down a steep hill at 40mph+, you'll be very worried about front end integrity.
No doubt that a compromised fork would be catastrophic. I have first hand experience,. Many, many years ago I road a bike down concrete steps at Pensacola Naval Air Station, not once but three times. It failed on downstep run #3 and I did a face plant on the sidewalk. I will be replacing the fork with this:
