Even if this was a trick thread, aside from legal liability concerns, I fail to see why this ought to be a problem - as far as I am concerned the world is not yet so perfect that there can't be an ethically necessary reason for changing one's IMEI number (it's statistically unlikely that anyone seeking to change their IMEI wants this capacity just to be prepared for ethically necessary life corner cases rather than, say, illegal activity, but still).

But anyway, currently, at least last I checked, changing the IMEI was impossible from userspace on the N900.