You have been moved to our blacklist. You will not see these IP addresses connecting to your pool and waste your pool resource anymore. Thanks.
So, is that an official f2pool stance - blacklisting any pool that actually
contributes to the Bitcoin network?

To make it easier, why don't you just make a whitelist of pools that SPV mine & use only them instead of leaching off every pool/node that cares & contributes towards the network? That way, you'd be doing us all a favor.