IO,
Surely that makes them the best people to lobby? They need to know that they are alienating a large group of European pilots, and that there will be consequences if they don't change their mind.
In my experience, people tend to take the path of least resistance. If EAS gets no resistance, then they'll continue down the path they have chosen. If they get a big backlash they may give it further thought.
Obviously it would be wrong to lobby them exclusively, but I see no reason not to lobby them.
dp