I've had this discussion so many times I've come to the conclusion that some people just can't be convinced.
The reason I think drilling for oil is dumb is because it's an old technology (burning stuff to get the energy out), we really need to move beyond it.
Asbestos was thought to be the perfect building material, as we've discovered, it is not. Lead was thought to be a great material as it didn't corrode, it was only later we discovered it was highly toxic. Leaded gasoline was considered more environmentally friendly, we increased the lead in the atmosphere a huge amount before we noticed. The same guy who invented leaded gas also invented CFCs, yeah, that worked well...
What I'm saying is that burning stuff to get the chemical energy out is a very outdated and rather primitive technology (we discovered how to make fire how long ago?) and needs to be replaced by something cleaner, renewable, more efficient, etc.
I'm sure there ARE environmentalists who think the telescope is a bad idea, just as there were when Cassini was doing a flyby of Earth. I am not one of those as I consider the pursuit of knowledge to be one of the most important things we can do. Obviously I'm not going to suggest we drop a few nukes to get a better understanding of the composition of the planet (which it would do), however as long as the environmental trade-off is relatively small I'm fine with it.
Now, if you think that digging holes in the ground to get ancient rotted plants to burn is a particularly intelligent idea then that's your prerogative. However it would be good to keep in mind that the most liberal estimates of how much oil is left contain less energy than the Sun provides to the Earth on a daily basis, and we've still got to find it and get it out of the ground.