I've seen a bunch of people go on random crusades. Investigation is fun and righteous indignation is intoxicating. For certain personality types it's easy to get completely absorbed by a mystery/crime and not even realize how much time you're spending digging into it until the sun rises. Others may be intensely motivated by perceived injustice, dishonesty, or graft. Or they may feel personally cheated.

I don't know who this person is or whether they are legit but it doesn't surprise me that someone would do this.