Um… there are liters lawyers and PR professionals that make their living with that kind of service. And for a certain personality type… I don’t see the 1k$/month being the relevant factor. I’d bet there would be buyers for that service. Though: Probably not enough to actually sustain the liability insurance that you’d need to deal with the complaints of a faulty product
It's OK. If the client tries to write a nasty tweet about you, or email a lawyer about you, it will "help" the client, by telling them this is offensive and blocking the action.