No, it is not. As a private businessman, he is not under an obligation to work for free.
He is under an obligation to not do harm (for example, by selling the info to terrorist groups, or by publicly revealing the details of how to exploit security holes), but he is not under obligation to hand over the fruits of his labor to government officials for free (which seems to be what the government interrogators wanted)
work for free.? The work was already done.
For your information, “ the government interrogators “ saw his tweet from onboard the plane. That’s why they interrogated him - just as they should anyone who does this.
“Find myself on a 737/800, lets see Box-IFE-ICE-SATCOM, ? Shall we start playing with EICAS messages? “PASS OXYGEN ON” Anyone ? :) “