When a poster creates a thread, it then becomes a "community thread" once the first response is placed therein.

At that point, the original poster is the "creator" or, but not "owner". The original poster bears no responsibility for subsequent posts that are not their own.

Everyone posting to a thread has a responsibility to keep their responses within the context of the original post, excepting as the conversation naturally flows and ebbs. Not every time a thread takes a different direction is it considered "hijacking". Just like in real life, conversations, flow, change, transform as they continue. That's good and natural.

For instance, I might start a post about my spring flowers being purple and beautiful right now. Someone else might "hop on" and say that Spring and flowers blooming are helping their mood so much, and the convo slowly turns to SAD. That's a natural flow. The person who wrote about their mood being improved didn't hijack; they were sharing in an expanded way.

In all that, the thread is a community thread, ebbing and flowing with response. At no time is the original author responsible for another's response. If there's a concern about a response, or hijack, contact a mod/admin.

If a thread takes a direction that appears to the author to have gone way off track, just like in real life, one can say, "back to the Spring flowers..."

To be specific, one is only liable for their own posting in both beginning threads and posting of any kind.

KD