I would be very careful about making the breach of contract public. Companies tend to have better paid lawyers and bigger pockets than individuals. Unless you are in a position where you can't be touched (for instance: because you are broke or in a different jurisdiction) this is a risky strategy.
First sueing an ex-employee is a massive reputation hit.
An employee who fails to receive full compensation can receive free legal help from a range of organizations with very deep pockets. In many situations companies have a significant advantage, but in this case they really don't.
Sure, people and companies may be completely irrational, but competent legal advice will tell them to leave this one alone.
