The zone defense has only been NBA legal since 2001. Before then, it would result in stopping the action with a whistle for "illegal defense. ""

区域联防直到2001才被联盟允许。在那之前，裁判会吹这是“违规防守”。

youdao

It is an illegal defense and may result in a "technical foul."

VOA: special.2011.03.25

The government accused Galleon Group titan Raj Rajaratnam of using an illegal network of sources to earn millions in illegal gains while defense lawyers countered the claims saying their client traded stocks on public information and not insider tips.

FORBES: Meet The Rajaratnam Jury

Fay won a subsequent court ruling that Conner's catamaran defense was illegal, but the decision was overturned on appeal.

FORBES: Magazine Article

Feeding an attacker data (so long as its not malware) may not be illegal, but these other active defense actions likely are.

FORBES: Caution: Active Response to Cyber Attacks Has High Risk