What can I do to protect myself in case Google randomly bans my accounts?

Ultimately, your first and foremost need is to move to a different email address: It's the hardest thing to change, it'll take you the longest. Get your own domain name, and set up an email address on that domain name. (I recommend Fastmail, but you can usually just do some rudimentary forwarding of it to your Gmail if you want too.)

Everything else you can mostly download from Google in advance, but it's key to update all of your accounts to not refer to a Gmail address. In the event of losing your Gmail address, you might lose any related account that requires access to it to verify your identity or login.

Try building solid online identity. If you become recognizable and get some followers then in case of problems you could complain on social media. If your complaint gets enough upvotes you get personalized support :/

No doubt mine too. First the foremost, get G's Take Out option ASAP. At least you'll have backups. I do that actually in two ways:

1. Take out

2. IMAP to local email client. Take Out format not always great and you don't get attachments. So doing the IMAP can litteraly be your identicial backup. I simple created a trucrypt encrypted 30GB container with portable thunderbird on it. The I fire it up once in a while to replicate/sync.

I'm also doing what others have suggested both:

1. I've captured as soon as services became available my name on all of the significant email services and I do keep them alive.

2. got my own domain but I realized having it on GCE cloud isn't the best idea. I may retain the domain but will need to the replicate my server onto diff cloud. Guess will need to think that through.

yeah I feel your paranoia.

Side note: I'm also wondering with their AI/ML. If I could get a psych profile based on my emails, searches etc... that would be an interesting read. I mean they have my searches and emails which they've scanned and profiled since their inception!

Separate question but if a Google account is banned can the username be reallocated?