I’ve helped/healed many a dying person so far and have had their mobs turn around and try and kill me instead.
I’ve also even had that happen and the person continues to run away rather than help. That “oh sh*t” moment 
Sometimes I’ve died, sometimes I kill all the mobs, either way that’s the life of an adventurer and I wouldn’t change a thing.
Keep in mind, day by day, were slowly turning modern wow players into classic wow players. Patience is required.