I realize maybe a minority of HN even remembers this, but at some point ~10 years ago, LinkedIn would agressively spam your contacts lists. If you logged in on your phone they would somehow get your phone contacts. When you signed up they had you log in with your email address, and then would try to get you to spam your entire contacts list there too.

I think web integrations have gotten locked down since then.. not for altruistic reasons, but because Google and Apple don't want to give Microsoft access to the data they have on you, so yeah, it's at least harder to accidentally give LinkedIn access to your contacts list now, but the damage has already been done for a lot of people