Better Cbox?

I have grown tired of having a cbox filled with spams saying "pls visit my blog", I mean, how do some people get here?!

Like the person who has a blog about weight loss, diet plans and @$$3$!

And comments like "I love your blog", you f**ing don't know me or what I do, to you I'm just a confusing girl!

So, I am in the search of a new cbox, one where people can't randomly advertise on.

Something with a password would be amazing... but I can't find one.

My question to you: Do any of you have any idea where I can get my dream cbox?

Thanks!