Ultimate PFs are a recent phenomenon, it was basically impossible to pug ultimates in SB and early ShB. This always happens when the fight is much greater than the average raider's skill level.

There were also blacklists in ShB, and there are google docs documenting bad (either in skill or in personality) players, describing drama in detail, and it was spread around.

I'm not sure any awareness needs to be raised. Pretty much every raider at the level of Ultimates knows about this. It's why people stick to statics.