How to handle noisy people on twitter?

[Henrietta]

I have some very noisy friends on twitter. They retweet like thousands of team-follow-backs thingy. Thus, 50% or more of my timeline are just unimportant trashes. I really want to unfollow them, but I feel bad cause they're my friends. What should I do? Any suggestions?
And I heard about muting people on twitter but I don't really understand how it works. Any explanation will help a lot.

[Kris L]

Don't get on twitter...

[Question]

Just unfollow them and claim your twitter was playing up.

[Jemma]

You can only mute people if you have the app echofon. Which is a twitter app. Then you can mute people. But for the web version I don't think you can do anything except press the unfollow button...

[Michael]

get off it social sites like that are for those who are socially inept