[dannyw]

The attacker isn’t a national state adversary. The attacker is a vengeful ex. The chances of such attacker even been aware of what hashing is, is close to zero.

Whoever designed this system is probably heavy on security, but low on product.

[kelnos]

No, the attacker is a bored hacker who wants to create problems for FB, just because they feel like it.

[lozenge]

And when the attacker Googles "how to upload images banned by Facebook" won't they find that article from that one vengeful ex who understood the technology well enough to build a tool?