There will likely not be any lawsuits. What Eric Alexander is doing is paying second tier lawyers couple thousand dollars to write a threatening letter to anyone who gives bad reviews. The letter is enough to scare people to pull the reviews down.
Specific to what this guy is doing to Erin: the idiot commented that Erin's measurements doesn't match his. Right there, he f'ed it up royally (luckily I took a screenshot of that comment before Erin removed the video and I would think Erin himself is smart enough to take a screenshot shot of that comment too). Now let's think about this logically, by this idiot saying his measurements don't match Erin's, it implies he has measurements. We all know there is a very good chance he doesn't have any measurements, because it's evident that this idiot built his speakers with no science (at best he has some quasi anechoic measurements done outdoors, at best). We know he doesn't have an NFS, nor an anechoic chamber, because Eric Alexander sells pseudoscience, again evident from his speakers and his Peter Pan patent. So all needs to be done is Erin shows the comment, the judge will ask the idiot to produce his measurements, which he has none, even if he did, he had to prove that his methods and instruments used are valid. If they are valid, then it would match Erin's measurements, because Erin uses the high precision NFS. He can't sue Erin for the subjective portion, because it's subjective, it's someone's opinion, just like my opinion that Eric Alexander is a world class idiot and clown and is a con artist and a pseudoscience peddler.
As for Amir: same exact thing. This idiot claimed the the measurements are botched because according to him it needed to measure at the woofer. Listen guys, even if the mic were pointed at the woofer, the measurements would still have been sh|t, because these speakers are royal sh|t, let's be honest with ourselves. And Eric would also have to have measurements to prove that Amir's measurements were so off, it did harm to his business. And again, he has no measurements!!!
Everyone can get a good night sleep, all bark, no bite.
EDIT: I know I quoted Tony and I know Tony meant that this guy is a lunatic going around suing people, I don't mean Tony is worry or anything like that. But I do see some people are getting a bit concerned here.