Seriously, who needs to record someone without the knowledge of the person being recorded? That’s a big red flag, a perverted character, there’s no other explanation. Creepy Mark Zuckerberg allowed other creepy characters to share personal moments with him.
But you do understand how this perfectly illustrates the point that these allow people to skirt the rules where filming isn’t allowed right? Your buddy is into coasters, cool, but the story only highlights why they’re problematic
Except that the intent isn’t to remove the ability to film but to remove the risk of debris falling off riders. If the theme park really cared about filming, they probably could ban the glasses as well since they would be caught during the metal detection.