They could be sued in small claims court.
Here that means no lawyers, no discovery, $100 to file in plain language, and a company employee (not a company lawyer, or a contractor, or a temp employee) must attend or they default.
$15k damages.
Reasons it could happen? Imagine grandpa has a tech come out 4 times, because his network is super slow. EG, this thing pounding his wifi for its scans.
Small claims court in the US typically requires actual damages, and doesn't add punitive damages.
Grandpa gets reimbursed for the four techs who came out, that's it.
Of course, that's the whole point.
Grandpa gets his money back. The company? Well, it has to spend money talking to a lawyer, because even though a lawyer can't attend small-claims court, they still consult.
They also have to send an employee to small-claims court, just have to deal with it. In the end it costs the company thousands of dollars maybe even over ten grand. It costs you a hundred bucks and you get your money back. That sort of asymmetry is beautiful, and if everybody availed themselves in small claims court, it would be far better than any class action lawsuit.