For my part I’m moderately inclined to be dismissive of the lawsuit threat, in main because the rule-of-thumb I’ve personally heard about threatening to sue is that, if you’re serious about it, you should consult your lawyer before you send the threat; I’m not a lawyer myself, though, and am unsure whether it gives the right output here (especially given that their preferred outcome was for Ben to delay the post without their suing).
Nonlinear indicate in their appendix that they’ve decided against suing. (Source; it’s the paragraph immediately above the linked bookmark).
For my part I’m moderately inclined to be dismissive of the lawsuit threat, in main because the rule-of-thumb I’ve personally heard about threatening to sue is that, if you’re serious about it, you should consult your lawyer before you send the threat; I’m not a lawyer myself, though, and am unsure whether it gives the right output here (especially given that their preferred outcome was for Ben to delay the post without their suing).