[Plugin: Visitor Maps and Who’s Online] Visitors To Blogs?

I really love looking at the visitor stats. Until I installed this, I had no idea that anyone was actually looking at my blog! This is a great program.

However, I am a little puzzled and a bit worried by some of the visitors I am getting from around the world. For instance I have one visitor from Shenyang CN that has visited my site 26 times in the past month! Another from Bejing, 8 times. For that matter I seem to get a lot of visitors from China.

I also am getting visitors from countries that I would find hard to believe would be interested in my blog. Is there something that I need to be worried about? Can I assume that they are unable to mine my site for any personal information as long as I don’t use my last name?
Thanks

http://wordpress.org/extend/plugins/visitor-maps/