This has happened to me several times, I have never taken it seriously or put much effort into responding. I usually would go straight to the throat and very personal. Publish their letter on the domain they seek, capture all lawyer and company details and publish to site. Use opsec for phone numbers, call them at terrible hours ( at home) to discuss offers of payment. They are trying to bleed you with superior resou…
> call them at terrible hours ( at home) This is a really nasty idea. You’ll be bothering their family who have nothing to do with it. Sounds like you’re advocating harassment of people’s families.
Two wrongs don't make a right, and it certainly may be imprudent to escalate. But there's no moral ground for them to stand on here - they're in the same category as any other spammer. Furthermore nowhere did OP advocate deliberately expanding the scope to their family. If phone calls at inconvenient-to-them times end up bothering their family as well, it's because they didn't do the work to separate their family from their ugly business.
In general I don't buy into the idea of declaring some times as off limits for phone calls, since society has never given me the same courtesy in the early morning. I'd much rather get calls at 10PM than 10AM, and yet it's somehow acceptable for businesses to return an afternoon call at 9AM sharp and pretend they're doing their best to communicate.