I don’t think this is a fair characterization of adversarial attacks on AI. People on hacker news are simply forecasting the future of hacking. People aren’t really saying ‘it won’t work, forget about it!’ they are simply pointing out that historically technology and criminal enterprise have followed a similar pattern to the garter snake and the rough skinned newt[1]. The more sophisticated deterrents evolve, the more clever adversarial strategies become.

[1] https://www.atlasobscura.com/articles/how-a-deadly-camping-t...