I may be wrong, but I believe i know what you mean evil. i find i have a tendancy to start daydreaming, just as people normally do, mind wandering aimlessly, but sometimes (and at times really often) it turns toward detailed thinking about an extremely strange and more often than not, violent, situation. Usually, I will suddenly stop and think, what the h**l am i thinking about that for? It's pretty scary. I hope we are talking about the same thing. In any event, I think you have a lot of company. I have no idea what it means, but I'd sure love to find out.

All I can suggest, is that you remind yourself you have no intention of doing any such thing and just blow it off like lint. Forget about it. I just tell myself it was just foolishness and to forget all about it. Surprisingly, it works (usually.) HTH