[dirkgently]

> Very very hard. Because the bot author does not have the giant database that FB has

You don't need to learn from all humans. You need to learn from very few (or just even one).

Not all problems are machine learning problem.

[gnulinux]

Not only that, this can be made a machine learning problem if needed. I'm a human, so if I train my computer to act like my mouse movement, it's sufficient to fool facebook. Well, now I realize that this is not as easy as it sounds since as other pointed out we don't know how fine grained Facebook's data is and what they're paying attention to. I'm just saying that theoretically I should be able to train my agent to act just like me.