My suspicion is that this is mostly happening because platforms that big like google or twitter rely very heavily on machine learning and other AI related technology to ban people. Because honestly, the amount of spam and abuse that are likely happening on these platforms has to be mind boggling high.
So I get why they would try to automate bans.
But after years and years of regular high profile news of false positives, one would think they eventually would change something.
I mean the guy had direct business with Google going on....
Why would they continue like that. Isn't there one single PR person at Google?
There are alternatives to all these: Search, Email, Game streaming, Online doc editing, Etc
Great, let's legislate that you can switch providers but you have to be able to keep your email address, like we did with phones.
I'm not aware of any mail providers that require DNSSEC. Were you thinking of DKIM? That's just 1 more TXT record (to publish the public key used to verify the signature), and some mail signing software if your mail server doesn't have that feature built-in (which is freely available).