I don’t have a tool that does this for you, but it’s definitely the way to go. Literally when I go into LinkedIn it’s just a completely blank page; it’s fucking glorious.
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I deleted Twitter during the 2008 election cycle and I “disabled” my FB acct (allowing me access to Messenger and Marketplace; the former only used for the latter) and it’s been amazing.
This is how you deal with these companies: by using their services without the noise and advertising that keeps them afloat.