Is training mobs completely different?

[Ditka]

So I have this um...friend, who use to train mobs in oasis by using a small nuke on sand giants, and I'm pretty sure mobs would aggro any player close, and I know for sure they would destroy anyone who was meditating. So now if I ran through oasis and I accidentally ran past an sg (they're hard to see) without even landing a spell on it, it won't aggro any player unless I pass them and zone.

So does anyone remember it being different or am I crazy?