Thoughts on how I might proceed to make him go away?
Thanks!
I can tell you what I would do in your shoes, it would take some additional time /effort, and there is naturally a risk factor involved, but it may work to make him go away..
1. File complaints with the CA state attorney General, as well as your states AG. He would need to use valuable time to respond to these complaints, which is bit of pay-back
2. File bar complaints with the CA Bar Asociation and if he is licensed to practice in your state, file with that Bar as well...again he would need to waste time to respond...more payback, and a showing you won;t easily be bent over.
3. Publicize his name, and those of the trolls under his employ on every online outlet that comes to mind...here, reddit, ripoff report, twitter, FB..not all publicity is good..
you need to harp on the fact that Higbee is not a copyright attorney, and harp on the fact that the image in question was linked, and never resided on your servers, therefore there was no infringement..
Just for good measure, when making your complaints I would demand a formal apology in writing from higbee, just to make him squirm, and fess up to being an asshat...not that he would do this, but when he doesn't it's one more thing you can publicize.. bottom line is , if he is going to pester you, you need to pester him more.