Obviously, IANAL, but I've been involved in a LOT of litigation over the years, including with the highly litigious Monster Cable. A couple people have mentioned some very pertinent things.
1. Has there been a cease and desist or other written communication from a lawyer? If not, this is pretty overblown. So full stop. This is just butthurt and whining.
2. Assuming there has been a written communication from a lawyer, is Erin's review stuff a business? If so, he will have insurance and if there is an actual legal threat, they need to be brought in immediately.
3. And as part of the expense of running a business, it would seem prudent to spend a thousand or so to get a shark to write a nasty response pointing out the legal peril that a threatened suit will put the plaintiff in. That will usually end things pretty quickly. See, for example, that famous response to Monster Cable from the lawyer running a cable company (was it Blue Jeans?).