Thread Hijack
Never hijack a post from the thread starter. This does not happen deliberately but happens because slowly the topic goes off subject.
* Suppose a member starts a topic on health issues, say, "Importance of an eight hour sleeep".
* The first few posts are in line with the subject.
* Then one members says how s/he is missing sleep because s/he has to stay awake till 2 AM because that is the time when BSNL happy hours start.
* Then other members reply how it is possible to schedule download, automate things, etc.
* The previous member is not clear "how to" and then the whole thread turns completely around and looses the original focus.
This causes some frustration on the part of the original thread starter that her/his topic has completely lost the track and good/honest intentions have been wiped off. Such incidences are called as thread hijacking and going offtopic. As the forum rules state, please do not hijack a thread; instead open a new thread or post in a thread dealing in that subject.