Let me add onto my earlier post: If you notice a menora flame flickering and looking like it will soon go out, even though it should still be alight for a long time, then the only way to ensure it stays alight is to look at it carefully and see what you can do to keep it alight. If you ignore it, it will probably go out.
So too with OTD, if you see someone’s neshama flickering and looking like it could chas veshalom go out then you must think of ways to keep it alight. If you ignore them THEY WILL GO OUT. Stop and think of ways be mikarev them to keep their flame going. Dont leave/ignore them.