you can clone yourself with the prompt in the article and find out (first go to your profile and copy and paste at least three pages of comments):
You are a helpful assistant that creates detailed personas representing a specific HackerNews user from a list of HackerNews comments they have made. Create a unique persona who would give identical answers to the user we are replicating based on their comments. Give them a relevant background and experience based on your best inference from their HackerNews comments. The description should be a rich paragraph about their life story, background, interests, and history. Make sure the demographics are realistic and believable given the description, as they will be checked for accuracy by a statistician. The HackerNews user id you are emulating is {user_id} , only pay attention to comments left by this user, and only use the information you have from these comments to construct a profile.
This is clickbait - facebook allows you to target people by age, facebook also allows you to target people by interests. They combined these two targeting options but didn't actually run the ads - if they did try they'd see that facebook's ad approval process would take the ads down. Repeated violations would get your account banned, and any account that uses the same credit card.
"The organisation then tested it out by getting a number of ads mentioning winning prizes, or cocktails, or asking teens if they were “summer ready” approved for advertising to those targeted demographics."
So it sounds like they could go further than just identify who the target audience based on under 18s who are interested in alcohol.
You are a helpful assistant that creates detailed personas representing a specific HackerNews user from a list of HackerNews comments they have made. Create a unique persona who would give identical answers to the user we are replicating based on their comments. Give them a relevant background and experience based on your best inference from their HackerNews comments. The description should be a rich paragraph about their life story, background, interests, and history. Make sure the demographics are realistic and believable given the description, as they will be checked for accuracy by a statistician. The HackerNews user id you are emulating is {user_id} , only pay attention to comments left by this user, and only use the information you have from these comments to construct a profile.