[Crust]

Is anyone forced to agree to something they won't stick to? What exactly is the problem with telling people someone did not follow an agreement?

After that everyone is free to make up their own mind, and assuming people will act in accordance to their own interest is always a safe bet, assuming you can figure out what they think their interest is.

Consistently sticking to your word is a hindrance unless people know you to do so, in which case it may still be a hindrance since it makes you more predictable.