Can't turn off "timeline follow"

On my Friends menu I have toggled "timeline follow" to OFF for a few of my Friends. Their plurks keep showing up on my Timeline anyway. I don't want to dump friends and send their Karma down, but my timeline will start to get more crowded, and I'm getting tired of muting individual plurks since they are always by the same few people.
 
indifferent I’m annoyed, but will keep using Plurk
Inappropriate?
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