I don't think this is a huge deal. The EFF is just advising that bitcoin could be a legal liability-- not that bitcoins are worthless, not that they're a fraud, not any of the countless things that people have said to try to discredit bitcoin. Just that adopting it may cause legal troubles down the road. If you think they're misadvising their clients by doing that, you're insane.

It'd be great if the EFF started pushing bitcoin, sure. There's no doubt in my mind that bitcoin or some similar cryptocurrency will significantly change how we transfer money in the next few decades regardless of what the EFF thinks. They don't have any obligation to defend or support bitcoin and I don't see why we should be upset at them for giving reasonable legal advice.