Did a request on the battle net account to see what information they are keeping from my account, thanks to the GDPR in EU.
Holy shit the list they gave me :
- my name, all the email I used and changed, date of creation, the normal thing
- my purchases using real money, battle net money but also the items I bought using tenders in the trading posts
- the gameplay history for the past 12 month, how long I played, on which character I logged in, when I did, down to the second
- ALL THE FUCKING CHAT HISTORY in battle net for the past year
- ALL THE FUCKING CHAT in /say or anything else in game for the 3 months or so because the dbm spam ironically made the list so long they had to cut
There's also things from other Blizzard games & forums but I haven't played any or used the forum at all so it was blank

I don't even think we are safe to say nigger or faggot to our friend or in wowg guild anymore.
To get yours, go to open a ticket on your battle net account, tab data protection > obtain a copy of my data. They'll send it to your mail within 1 week.