If it makes you feel any better, even if you're picture is fake, I would still probably smash that.Smash that deeply.
I wouldn't pay too much mind to it. No matter who anyone is everyone will always get someone over the Internet or a group of people not believing their identity. I figured it's because some people think they're being cat-fished and/or put in a situation of entrapment. Just stay away from those people. There are a lot of people who will believe you or simply not care enough to believe or not believe you. If it's really an issue for you then all you can do is keep being active. Eventually you will become a regular and those people will believe you are who you say you are. Or they will just lose interest.