Your statement is also not accurate, because there were several variants of "the agreement" and for some pairs of companies the agreement extended beyond cold-calling [https://www.lieffcabraser.com/antitrust/high-tech-employees/]. I'm sure multiple careers were set back when their prospective employer's HR department notified their current employer's HR department about the disloyalty.
Those allegations didn't have very strong evidence. They were repeated by some lawyers looking for people to opt out of the class action. When I asked for details they didn't have anything.
