If a thread is created to share information and knowledge then it doesn't have to be deleted, since the main purpose of the thread is to share info... but there are people who just love to debate and spam using replies over the thread they should be the one reported and their post should be reported....

As for thread that obviously useless or let's just say duplicated by other person then the thread should be lock away...

There is nothing wrong with reporting , since in your line of standards that thread is useless and nonsense then feel free to report , now it's up to the moderator.and other staff to double check and evaluate if the thread is subjected for locking...