No one is ever going to accept you as a real poster and you will always be viewed as a gimmick.
The only way to end the rumor is to accept the upside down cup challenge. If not, people will not take you seriously, no matter how often you say, "I am not a gimmick."
I wholeheartedly believe that you are a gimmick. Despite that, it's still funny to see other posters meltdown when you post something they disagree with.