The problem sirencall, CycleWest, et al here have, is that they don't know how to properly gauge risks and know little about the projects they so vehemently oppose.  

People understand fluid hydraulics very well and building/operating a pipeline is by no means a difficult endeavor.  

I have a feeling if those posters applied their same ability to analyze information and apply risk to other industries, they'd ask for people leaving their houses to be banned.  

Key lesson folks; building the pipeline and having clean water, air, etc are not mutually exclusive.  Sirencall demonstrates this false dichotomy perfectly in his first reply, which is the standard go to for those who oppose the project but have no real arguments.