Debating an English Only Policy

I’m getting comments like this:

Ну и чё с ними делать… Меня достали на моём блоге я устала вычищать…

I have no idea what is being said here, I don’t even know what language it’s in.  Is it spam or is it someone telling me how awesome and amazing my blog is.  I don’t know, and I don’t know what other people are doing with this.

Until further notice, if I get a post that is completely non-English, I will be marking it as spam.  If someone can offer me a good reason to have a different policy, I’m all ears.