banning regions that don't contribute to conversation

[engine]

Should certain regions be banned from posting because they don't contribute to conversation and interaction on forums?
I ask the question because I'm sure you've al, with forums and communities,l seen spam and spammers that have nothing to contribute but spam.

should the whole region be blocked, or are the few contributors to denied access?

[martinibuster]

There are some regions that drive a high amount of spam and zero member activity. Those are easy to block. Others, because of a history of the English language in their country happen to drive legit traffic in addition to spam. The legit traffic is the reason I've chosen to not block those countries.

[piatkow]

should the whole region be blocked, or are the few contributors to denied access?

Blocking individuals is pointless, a bot net will be hitting you from multiple sources anyway although there seem to be a few people who do manually post spam. I block Russia, China and Brazil as I have only never seen a legit visitor from those countries but plenty of spam.

Blocking IP addresses in your own country can annoy customers and annoyed customers tend to tell a lot of people how bad your site / product is.