Tim, you strike me as a mover and shaker, and we need more like you!
I'm just fair minded, and look at things from a logical, rather than a emotional, point of view. Both styles have their place. I'm all for doing away with gas, oil, and coal completely and going all out on nuclear, put the money where the least damage is. But you can't be against everything unless we all decide to not use any source of external power or any items which require power to make. Unfortunately, the environmental movement has the nuclear industry in a bind. And while it sucks (for us) that its local, gas is the next best thing.
There is no way gas drilling can be totally harmless, but the degree of "badness" can be controlled somewhat. You're not gonna stop it altogether, and its useless to try that approach; you gain nothing but the satisfaction of griping about it. Sure, you may keep it out of stream X's drainage, but that just puts an extra well on stream Y. The only thing we can do is ask for protective rules and enforce those rules. Make them accountable for screw ups, and I mean seriously accountable. For groundwater contamination issues, Marcellus is no different than the gas wells we've had for years. They were frac'ed just the same, and most of that was at a much shallower depth. That doesn't mean the requirements shouldn't be tighter now than they were then. Yeah, its likely there will be a couple of cases of groundwater contamination, and we should limit that as much as possible. Most of these will be due to equipment failure, a cracked pipe or barrier, etc. The question is whether they could be using better equipment, they often cut corners to save on cost and end up taking a bigger risk. When something happens, they also have a tendency to cover things up to avoid fines, so the monitoring has to be there. If the penalty is stiff enough, the cost/benefit factor favors the better equipment, and we'll have less "incidents."
The new issue with Marcellus is the volume of water used. The permit process, and whether or not its enforced, is where the lion's share of the focus should be. I'm not talking slap on the wrist enforcement. I'm saying make violators go bankrupt, and the next company will make sure it follows the rules. I also find it worrisome that, as far as I know, the permits only state the drainage, not the individual streams or time of year/flow rates, etc.