Wild. I'm like 99% positive I know the couple and the newsletter they targeted, because I used to work for an ecommerce company that also came under fire from said couple semi-frequently.
Of course, like adults, we just rolled our eyes a little bit when it was particularly over-the-top and tried to use our rational heads to determine whether the criticism was warranted or not. Truthfully, I think they kept us in check and I'm glad they exist.
If we had done anything even close to this, we would've been fired immediately. To be even more blunt, I think I would've been fired for interacting with them AT ALL, even just a strongly-worded email.
Just a little wild to see how differently people react to the same exact situation.