I'm starting to have some seniority in my career, and I'm fortunate enough to have a fair amount of savings. As I've progressed in the industry, I've started to realize what I do and don't want in a job and which companies I have no interest in. The reasons may be something that a company couldn't change (industry, too big size, etc.), or very unlikely to change (entrenched C Suite I don't want to work for, and long-standing policies I don't want to be under).
From time to time, I'll get nonbot cold emails from recruiters for companies I know I do not want to work for. Like all cold emails I receive when I'm not job searching, I ignore them. For one of the companies, they've reached out several times through different recruiters.
My understanding is that if I were to tell someone at a company to go pound sand or some other suitably rude comment, I'd be put on a blacklist as a 'do not hire' and would never hear from them again. I'd love to not hear from a few of these companies anymore, but it's not worth being mean to some innocent recruiter.
How do I politely get a company to put me on a 'do not hire' type blacklist, as I know I never want to work for them?
Clarifications: I don't feel the need to tell them why I don't want to work for them (unless it'll achieve the goal that they leave me alone), and I'm not worried about the risk that at some future date I change my mind and would be willing to work for them.