Hi,
don't you worry, this is not the "hacker". Just someone who saw that post and looked for the username in the leaks, also tested some other entries:
An Error Has Occurred!
Sorry Guest, you are banned from using this forum!
It appears very likely that your account was stolen due to you having a weak password. Email hacked_2019_xnonm[_at_]bitcointalk.org
HJCoinminer:987654321
taha.akhtar.89[_at_]gmail.com
Date Registered: January 24, 2014, 09:05:02 PM
https://bitcointalk.org/index.php?action=login;ccode=260a43b02e2491ed3b9f