we do not share your data with anyone and there are many ways to control the visibility and storage life of your data here.
but the internet is a public space and you should always assume your data could be compromised.
be smart with your password, use tor or a vpn, and use pgp for sensitive communications.
Neither, I don't need a monopolist to protect me from fraud, reputation systems do this without cost. It's kind of amazing a little biggy user can not see this.→