Hijacked? Such a harsh word. Can any of us know at the first step, precisely where a path will lead us, or at the first post, precisely how a thread will develop? Is a thread less valid because its header has no relation to its content? How often does this happen to threads not deemed 'hijacked'
Could we not call it a thread that was 're-purposed', or 'laterally explored'? In this case, perhaps the thread was 'rustled'. (“Sheriff, them varmints from the other side of the valley done rustled our thread agin-let's get a posse together, and head em off at the third paragraph...”).
Each newly opened thread is as a fledgling bird, nudged from the nest-it may plummet to the ground, never to rise, or it may find its wings, soaring into the clouds. It may perish at the hands of a raptor, or live to perch on the shoulder of a noble statesman's statue, and leave its small deposit of respect thereon.
Think not of a thread as hijacked, but rather exalted in a new and un-dreamt of manner.
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Dance like you have never been hurt, work like no one is watching,love like you don't need the money.