The ICO has reported that it has fined a company for targeting elderly people, bombarding them with the very nuisance calls it claimed that its products could protect them from.
The ICO report makes salutary reading, and you can find it at https://ico.org.uk/about-the-ico/media-centre/news-and-blogs/2026/08/ico-hits-company-selling-call-blockers-with-190k-fine-for-nuisance-calls/.