no. teach them about the dangers of porn and other dangers online. ban porn from their devices. if you make porn out to be this unspeakable horror, it only leads to a natural curiosity which can lead to an unhealthy relationship with it or even sex in general. please note that i am not advocating for actively allowing minors access porn, nor do i encourage anyone to access it themselves. a phone can be a tool, and tools come with inherent dangers. teach your kids like you would with driving a car or not eating junk food.
tbh i would also lose my mind if a local told me to “look out for a cock-or-two”