I noticed that the database of a big exchange is being sold on black markets. Can't confirm if it's fake or not. The exchange in question is collecting KYC data (for all of it's users), it's a big "licensed" exchange.
Also, users of some cryptocurrency exchanges are complaining that they receive targeted crypocurrency related spam and the most likely cause of this is the stolen database of their exchange.
This is why most people prefer non-KYC exchanges (which collect only email addresses).
It's better to use unique e-mail address (or alias) for every cryptocurrency exchange in order to know which exchange's DB was hacked and abused to spam the users.
Check your email addresses here: haveibeenpwned.com
They have BTC-E's DB with emails. Also, Bitcointalk. Thank FSM they don't have KYC data for most of the users.
But if you signed up to BTC-E or Bitcointalk with your public email address, now the whole world know that you have account there. Including your tax authority. They will be very interested in this matter.
Don't reuse your email addresses!