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.
Always use VPN us use this site through Oprah that also has build in VPN. I'm no tech guy just my opinion on wat works for me hope it helps.