Earlier quoted context omitted.
No it's much worse than this. They never threaten the employee. They threaten the company hiring the individual. The employee might take it to court(and it most states win), but the hiring firm has no incentive to do so, and just moves on the next candidate. They don't have to sue, they just have to send a letter to the new firm. Or even worse the new firm just has to ask "did you sign a non-compete?"
Huh. But the hiring firm didn’t sign the non-compete, so how does the first company go after the second?
This is the reason why employers ask if you've signed a non-complete