Jo,
That's the 3 time I'm addressing this issue. The previous two times BungoHelp6 (or so) answered exactly the same.
It would be nice to see a real Bungohuman. The problem is over 3 months old. I'm unable to block any player. ^^
Nice work there.
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the answer is wait 3 weeks and the game will be on steam and you will not have to worry about blizzard's blocking