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My account AvenG (ID:67153) has been recovered on 22th February 2019. Today is 2nd March 2019 my alternative account is Mapuche33 (ID:2328967). Thanks LoyceV for helping :)
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Verified, and I've removed my red tag. I've left a neutral tag to confirm it's back to it's owner.
staff already replied me saying that unfortunately there is no easy way to delete posts and threads.
Using your middle mouse button on the delete button is quite fast to get rid of posts. You can't remove threads, but you can edit the OP (say: "this post was created when my account was hacked"), and move (lower-left corner) the threads to Archival.
For the record: those are not mine so I 'd like to ask some moderator to kindly delete those as well.
If the above doesn't suffice, you can click Report to moderator and shortly ask to delete it because it was posted by a hacker