I am in the pull the bobbin thread to the top at the start and end camp.
.... CKCowl described it well as to the how to.
Agree, it is not really necessary, but I tend to wait and do several burials later.
By bringing it to the top, I know where they are, and it is less likely that the threads will get caught up, tangled, stitched in ... and a mess created, until I do those group burials!