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The desktop version of Facebook has a "feature" I call rando-bait, the column on the right of what your friends are commenting on.
You have a FB friend (like a relative or someone you knew in highschool) who has very few other friends active on FB, few friends in common with you, and quite antagonistic views to most of your friends.
Their rando-bait section consists largely of updates on your activity, providing a constant temptation for them to butt in on threads of strangers to them.
@larrybob yet another 'leave f*ceb**k' argument! I'm not on it, but it sounds like it has become a living nightmare. Depressing as hell.