My blog recently crossed the 500 follower mark -- and each day, I am notified of new followers. Some of these have wordpress site and some do not -- but I'm a little concerned that this is all some kind of spam. There aren't any comments -- just a lot of questionable followers. When I follow the link (if there is one) to check them out, the sites are usually a business or in a foreign language (I seem to be really popular in Indonesia, for some reason). Should I be concerned? Is it a security issue? Can I refuse followers?
The blog I need help with is nittygrittydirtman.wordpress.com.