How can I mute a Google+ circle?

I've seen that the main stream is composed of all the singular streams from the various circles. I can mute a single post or contact, but not a circle (all the posts coming from people belonging to that circle) nor compose the main stream in order to specify what circles to draw posts from.

Any idea?

EDIT:

Thanks for the suggestion on blocking them. but i really don't won't these people to be blocked. Let me clarify. I have all my friends and family and colleagues in circles and they all show in the main stream page (that is G+ "homepage"). I've noticed that may illustrators / comic creators / public persons i generally follow (on twitter, their blogs) have a G+ page. Due to the nature of G+, they're using those pages like blogs, posting pictures, news, comics.

In my "virtual world", though, they're second level citizens, I'd just like to follow them once in a while, in my spare time, like "let's see if there is some good new comics", but on a day-by-day use, I don't want my family and friends post to be sunk in thousands of less important to me posts!