Who are these people?

I can see the general location of people who read my blog, using the "Where they are" button in the sidebar, and I am always amazed at where some of my readers are located. How, other than random searches, do they ever find me? What must people from obscure countries think of my rants? (Especially those from the Middle East, given my lack of humor about certain Islamic radicals...)
Whoever you are, thanks for reading my stuff.
If it offends you, don't come back.
It ain't likely to get any less so...