IMHO this diversion doesn't classify as an attack. It was not meant to hurt in any way, or at least there's no sign of any harm done in your post. I try to use common sense first, and only afterwards stick to the letter.
Not sure exactly that comparing DNSSEC (signatures == trust) and DNSCurve (encryption + signature but only hop_to_hop, not up to root.) makes sense, that's why I said above that unbound + OpenNIC (which I trust and support DNSCrypt).
If the data is changed without the permission of either end party, then it is an attack. There was no 'harm' done to the parties involved, but the 'attack' here is not aimed at the parties, it's aimed at the integrity of the connection. The integrity was completely destroyed, so I think 'attack' is an appropriate term.
Not sure exactly that comparing DNSSEC (signatures == trust) and DNSCurve (encryption + signature but only hop_to_hop, not up to root.) makes sense, that's why I said above that unbound + OpenNIC (which I trust and support DNSCrypt).
Thanks for taking the time to reply