This is a symptom of people being to primed to believe that mentally ill people are dangerous, not a legitimate cause for concern.
Purple call the police on someone yelling. A mentally ill person yelling isn't a danger. They might be in crisis or pain, or they might be unable to effectively communicate.
A gun didn't help in any of those, the vast, vast majority of cases.
I don't think doing an action to have the policed called on you is the best approach, considering it can be weaponized by dishonest actors.