Earlier quoted context omitted.
This is kind of a weird hill to die on, but you’re well within your rights, so you do you. However, it is clearly not correct to say that you were banned from GitHub. It’s like saying “I was banned from Google because I refuse to use computing devices.” Not really a ban, just self flagellation, which, again, whatever works for you.
Give me your social security number or you may not reply to my comments. If you don't give me your social security number, choosing instead to die on this weird hill, it's not correct to say you're banned - you're merely self-flagellating.
I mean, obviously you disagree with them being generally reputable, but you must realize that’s not a broad opinion, and they are certainly better at preventing data breaches than the average company that stores phone numbers.
Sincerely though, I hope you get your GDPR request sorted.