SEO for Amazon Blogs -Block countries except U.S.?

[Jeannie Crabtree]

I have been building a few amazon affiliate websites.

I am running into a problem though, which I have not seen addressed here or on the internet. I reside in the U.S. and am getting things such as

* Genuine searches for products from canada.
* Google translation visits for one of my sites from china, 104 for 1 site in June that only gets a little traffic so far, so I am thinking it is people translating my reviews into their language for their use. So far this month from China 48 pages have been visited using 296.21 KB bandwidth according to stats .

So questions -

Do I start blocking countries that would not be buying from U.S. based Amazon such as Canadian visitors

Do I block what appears to be the chinese bots/scrapers

Do I block all countries but the U.S.

And how to do the above?

Should I sign up as an affiliate for Canada Amazon and put an extra link on my posts?

Thanks.

[Jeannie Crabtree]

I wondered if any body had some ideas for me on this?