You don’t have to believe me. You can do a quick search on the jurisprudence surrounding trade secrets and employee poaching. There are plenty of cases in high value industries - mostly banking and software.

If a company lift a whole team in a short span of time, it gets really hard to argue there is no misappropriation.

Are there any examples where mass “poaching” was the only evidence? I found plenty of examples where it was part of what happened, but they all have other evidence of theft of trade secrets or whatever else the lawbreaking behavior was.