"It's unfortunate what happened to this guy but it clearly isn't wise to have the phone number of underage girls on your personal phone. Get a business phone FFS."
What, and then text sex messages to your girlfriend from the business phone? Wouldn't that be better done from your personal phone? Which would contain the phone numbers of underage girls? Which would do absolutely nothing to help solve the original problem?
Good thinking. Have you considered a career in Government?