Is it too late to do that?
My immediate line of thinking to this thread of "sometimes you have to use an account to sign in" was that then you'll need to create a new account specifically to sign into that service. If you have to sign into that service. Maybe I'm weird, but I tend to even use a DuckDuckGo e-mail when I sign up, so that a specific service is in no way linked directly to me and so that I can stop forwarding e-mails from any specific service.
To be fair, I sort of wonder why Github has an API that allows 3rd parties to star projects with your account. I get that the author of this post on HN is responsible for not reading the "clicked through pages" part of the processes and that they should consider themselves sort of lucky it was only abused for star farming, but why do we have that sort of "facebooky" functionality on Github in the first place?