DC30 is all it takes to stop a fight? wow that's actually fairly easy. I mean a human bard could have a 25% of doing that at level 1 with minimal investment.
How would you achieve this? A bard doesn't get inspire competence until 3rd level, so the best I can come up with at level 1 is a +12, which is only a 15% chance. That's with a 20 Cha and skill focus, which I wouldn't consider minimal effort either. Still though, yur point is well made. Avoiding fights whenever you like is an enormous advantage, which would be achievable within just a few levels if a DC 30 was all that was required. The point of note though is the minute of smooth talk that is also required, which most enemies won't grant you.