I don't know the relevant laws surrounding this, but I'm surprised they're only suing for $75,000 for something that's been going on for almost 15 years.
Nuisance lawsuits tend to be for sums of money large enough to be "worth it" but small enough to encourage defendants to just settle for a quick payment instead of risking court costs that might exceed the settlement payment. It's not an explicit tactic or anything, merely the outcome of continued selfish self optimisation on behalf of both plaintiffs and defendants seeking "justice money" through such lawsuits.
Almost refreshing to see a number so reasonable in a US lawsuit.