Personally, it seems you are attention seeking and in my opinion you have fabricated the story to seek atttention.

If what you state is true and someone wanted you to display that signature, there could a lot of reasons. Maybe it happened because a thread was created stating that Sinbad mixer was a criminal enterprise based around money laundering and would be shut down soon.

Around 5 months later Sinbad was seized by US and other law enforcement agencies and as a result of that incident it became the main reason theymos banned mixers from the forum. With all the other reasons, maybe someone does not like him for that reason, we do not know if that is the case and we do not know of you are honest in your claim.

If on the other hand you can provide evidence by giving the name of the member and show a screenshot of the messages it would make a difference to those that have opinions about you.