I was thinking about deepfakes and how to protect from them and my conclusion is; there is no way you can protect from them from the practical point of view but from the legal point of view, governments can make laws where everything shared by somebody else that involves you is presumed fake unless there is substantial circumstantial evidence that says otherwise e.g. witnesses, legitimate metadata etc. etc.

Even before LLMs and GenAI, Photoshop became a synonym for messing around and faking photos so there is nothing new here but now there is more powerful "faking" software available to the masses.

Before computers and digital mass media sharing some compromising photo or tape could've been assumed authentic but now in the era of computers and software there is no way you can tell that something is authentic for sure.

>What if a third party gains access to your social media account(s) and starts posting fake content from there?

You can cause chaos and bad press in the short-term but when the original owner of the account restores ownership of the account everything falls apart. Like the commenter below said it happens all the time and it doesn't have any real impact on anything whatsoever.