Even better, tell them you’re working for one of their competitors.
I can imagine a smart competitor putting these people on retainer, for a small fee. Do that in return for NEVER being available for SunTrust per a non-compete agreement, and cripple your competitor without spending much money.
Or hire them outright for your own team, in any capacity, and tell SunTrust it can’t call them or that it will bill them a thousand dollars an hour for consulting by their former employees.