Alright, let's just run through this one more time.

For all the people out there who still rigidly stick to their avoidance of any real research or, you know, actual education on how anything functions, despite having the entirety of the sum of all human knowledge at their fingertips via the very screens that they're uploading to social media
It does nothing. It doesn't add up to squat, it doesn't serve to do anything. You can't make a claim in court with an IG Story.

It's the equivalent of Michael Scott declaring bankruptcy by literally yelling it-this is a pointless exercise that has been debunked over and over again, in different form.

This exact message, which has changed a little, had started going around June after Meta was announcing the inclusion of user content into its large language models that power its AI systems.
And then when celebrities like Rafel Nadal share that stuff, it obviously goes viral, but to be clear, the use which you are trying to object is something which you already agreed to tick off that "I agree" box on every app's term of service.
Meta has also clearly stated that it's going to use your public posts for AI training.

"We train AI at Meta using publicly available online and licensed information plus the information that people have shared publicly on Meta's products and services, including public posts or captions accompanying public photos.". In the future, we may also use information with which people are comfortable sharing when chatting with our generative AI features - such as Meta AI or a business - in order to build and enhance our AI products. We don't use the content of your private messages with friends and family to train our AIs".

So your private posts and DMs are safe, but anything you share publicly in Meta's apps, which Meta facilitates in distributing, it's going to use to train its AI systems.

The EU has the option to opt out of having your posts used for AI training, via the EU's "Right to Object" option. All other regions do not have that option yet.

And posting some vaguely threatening message about "an attorney" will do absolutely nothing to change this.

From Meta:

"Sharing this story does not count as a valid form of objection."

It's not a legal filing, it's not an official document. It won't signal to the algorithm that "this one knows," which, in turn, will make Meta leave your stuff alone.

It is nothing. It is engagement theatre. But worse, it may actually inform potential fraudsters that you are dumb enough to swallow this scam, putting a flashing red light around your neck as some kind of 'easy target'.

So when you see your favorite celebrity posting something like this, where you are pausing to consider whether it really might be a legitimate defense in court, do this: Go read about legal rights, read about copyright, go read the app user agreement and what you agreed to when you signed up.

Go take a look at the EU Right to Object, and think about ways you might want to engage with candidates who also propose such concepts in your country.

All information is there, and of course, the internet unlocks all fantastic resources worldwide, so you can learn from the true logic behind anything instead of what just one social post might say.

Social media is designed for instantaneous, lightweight information, and it can't be used for serious politics or law. That's why it's been an absolute disaster for political discourse--too many people are reading a single sensational post that shifts their perspective, whether true or not.