You shouldn't either. I bet Marty McFly wished he had seen these time-traveling tidbits before he went back to the future. I bet he wished his mom wasn't his mom either, but that's a whole other story.
Implications - This collection of 12 time-traveling tidbits is without a doubt one of the best travel series' that I have had the privilege of putting together in a very long time. You will be rewarded for having a gander.