No doubt about drilling for oil being dangerous. That's one reason why u won't find any Sierra Club members or NY Times writers who have worked on a rig.
Although it's against my libertarian principals; there really should be a rule requiring basic mathematical competency for newspaper writers and environmental club types (I regard myself as an environmentalist but I don't need to be in a club of fools). I figure if they had that, then they could figure out the absurdity of their statements about the oil industry and 'clean energy'.
the accident was another sign of the dangers of oil drilling
The premise behind that statement is that an increase in U.S. oil production (without a concurrent increase in the number of oil pipelines) goes hand-in-hand with more freight traffic, and an increase in train traffic will result in more accidents.
That and Bakken fuel is high volatility and a more dangerous freight than regular crude oil.
I suspect the CSX oil train derailment resulted from the deluge of rain Virginia and Maryland received at the time (> 4-5 inches in a day). It caused a street embankment collapse in Baltimore that closed a CSX track. The day after the oil spill in Virginia, there was a CSX coal freight train derailment in Bowie, Maryland, which had "no environmental impact." Two bad days for CSX.