I went to the EFF for help on a similar case once (I am the author of the old Chrome "Facebook Adblock" extension).
I went to the EFF for advice mostly, did I need to comply with the takedown? Should I be concerned that I couldn't meet all of the ridiculous demands (they wanted personally identifying information about everyone who had downloaded the extension!). EFF's response? In summary "We're not sure on this one… But can we blog about it? This may or may not cause you more problems."
I didn't hear from them again after I asked them to keep it quiet for the time being.
I went to the EFF for advice mostly, did I need to comply with the takedown? Should I be concerned that I couldn't meet all of the ridiculous demands (they wanted personally identifying information about everyone who had downloaded the extension!). EFF's response? In summary "We're not sure on this one… But can we blog about it? This may or may not cause you more problems."
I didn't hear from them again after I asked them to keep it quiet for the time being.