As much as that is an option, having checked out our real user base, about 5% are from that part of the world...
When the spam avalanche hit, the autosystem bulk banned several IP ranges as an emergency step one measure, but that locked out about 20 members.
When the attack continued, then it bulk banned a total of 77 IP ranges before I could manage things and clear out the mess.
So, it comes to dealing with them at other levels... manually... one at a time.
Tera
Admin