Just so you all realize - you can stop a ravage its called a Stun, a knockback, a mezz.... they all stop a ravage.
Can you interrupt the channel with your interrupt - no.
But it can be stopped. Its not like it gives Marauders CC immunity when its channeling.
Anyone who pvps and has half a brain knows that. Unfortunately, if you go a few pages back Exgrunt doesn't know. Most of his outrageous posts have been deleted, but you can still see him claiming that regular interrupts can stop Ravage. Worst thing is that his main is a marauder.
Just proof that people are just that bad...
As to what you said, you are partly true. What you left out is the part where the Marauder has full resolve. Or the part where the marauder has you rooted.