You know HK-47 says that Revan used going to war against the Mandalorians as an excuse to convert the Jedi and soldiers who had joined him and turn them against the Republic and Dark Jedi. Do you think this was the case or did Revan have true intentions of stopping the Mandalorians?
If he DID plan to attack the Republic, what made him do so, the Sith teachings from the ruins on Dantooine from KOTOR 1?
Why did he leave Onderon intact in the Jedi Civil War? Was his grudge only against the Jedi and not the Republic?
Kavar says that the Jedi chose to hide on worlds touched by war in order to prevent themselves from being detected, but he hid on Onderon, which was not touched by the Jedi Civil War?
So yes, they were afraid that this ability could be taught, that the echo was spreading, and when touched by the dark side it was capable of terrible things. But frankly I think these are all just excuses; they feared the echo itself, not just its effects.
Isn't the echo ITSELF the effect of terrible things? Terrible things cause echoes, not the other way around right? So they feared the terrible things which caused the echoes right?
The Exile had a natural ability to influence others and be leader, but instead of appreciating this, the Masters criticized him. Is this because they think that if the Exile falls to the Dark Side, he will influence others and make them do his bidding? Is that what they fear? They think that after all he has done to help them he'll fall to the Dark Side? If the Exile would have been affiliated with the Dark Side, would he have not killed them on their respective planets?
In the end, the Exile destroys Malachor because of the Sith Academy there but does its destruction in any way seal the wound? After its destruction would the Exile still not carry the cries of the people he slayed there?
And by saying that he carries the cries of the people he slayed, the Masters mean that he cannot be sensed through the Force and appears void of the Force right? Then how does Chodo Habat sense him on Telos?