In network management for security we might cut off IP's for entire countries if there were attacks originating from part of the country. It is pretty crude and easy to get around, but we do it for the right reasons. It is no different in meat space, if there is an attack of disease, you stop it from coming the best that you can, not perfectly, but enough to greatly reduce the risk.
EXACTLY!!!
If ‘traffic’ from a certain area tends to be a generally higher risk, you block it!
I once worked for a company that had some manufacturing plants in China. We had remote users traveling to various hotels over there, vendors, the plants themselves, and various other traffic. It was a nightmare for awhile. At every place I’ve worked, all traffic from China, Russia, and a few others are blocked as just a ‘ground level’ precaution.
When you have to allow traffic from China it gets crazy. We of course tried allowing specific IPs, blocking everything else, but that created a lot of headaches. I eventually formulated a solution just before our helpdesk guys (understandably)committed mass murder/suicide. My apologies for straying off topic. Replying to your post reminded me of it all. lol