Refrain from posting on that site altogether. Even if your conclusion/synopsis is pro-gun, they are only displaying the first few words of your comment; People have to click on it to read the whole thing.
Ultimately, I have no doubt they will hold it up as "gun violence has ruined the lives of all these people".
Yeah, I have a story. I'm a survivor of homicide, I lost my father and step mother to a 17 YO drug user with a stolen handgun. That it made me embrace the utility of the firearm in defensive use will be a moot point if I post my story to that site.