Visual cues in Timeline to avoid overwriting out-of-visual-bounds media by mistake

It would be a HUGE timesaver to be able to drag and drop or move media in the Timeline with the confidence that NO media outside of the Timeline's visible bounds will ever be overwritten by mistake.  An overwrite warning is the simple solution.  It would help editors avoid having to constantly zoom out to paste safely and zooming back in to resume editing, or undoing/redoing to confirm nothing was deleted by mistake.  Please watch this video for the full explanation:

https://www.youtube.com/watch?v=S5yjiwsWrZE&feature=youtu.be