A Wise man once told me after I received my carry permit
"Son, just remember that card didn't come with a badge and cuffs or a secret decoder ring".
A CCW has nothing to do with this. A call to 911 should have been made. Making that call doesnt make you a cop...it makes you a concientious and law-abiding citizen. A tazer is, at a minimum, a debilitating weapon. And how it was being used by these persons was easily reckless endangerment. That situation the OP witnessed definitely warranted a call to the 911.