I can imagine headlines like that too, but the idea of electing 5 (or some other odd number of) entities is that they would be able to share among themselves the cryptographically signed evidence of the spam they detected, and then the bond slashing would require a majority vote.

So instead, the headline should be something like "Ask HN: Google, Amazon, and the Shanghai Cooperation Organisation forced me to send $100 of Ether to UNICEF and I couldn't send any new emails until I sent another $100 payment to my domain registrar. How do I take them to the World Court to force them to reimburse me?". That's not a great situation, but it's slightly better than the status quo.