Possibly, your account was blocked for a ban evasion.
When I first found out about bitcoin it was just this year 2017. I got very first account banned because I was a total newbie and I didn't know about the rules and regulations so now I know somehow how bitcoin works.
This probably is the reason why you got permabanned in the forum, In the proof you showed I doubt that mods would make such mistake on banning the original poster rather than the plagiarizer as coinlocket$ has clearly stated on his
post on who posted the "original" one and who posted the copy. He even clearly stated black point's name as the plagiarizer.