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.
Give transaxe the blockchain url and it gets sorted. Many people here agree with your point about no-account transactions, they even had a referendum about it but nothing has changed yet.→