[Azkron]

This reminds me of the CEO of a cyber security company that challenged Anonimous https://en.wikipedia.org/wiki/HBGary. If you work for any kind of security company, do not ever ever ever challenge any kind penetration specialist. Everything is hackable, it is only a matter of cost vs reward, but when you challenge someone that goes out of the window.

[matheusmoreira]

Generalizing the advice..

Don't challenge people. Don't insult people. Don't humiliate people. Don't threaten people. Allow them to maintain their self-respect even when they lose. Don't rub it in. Give them a face-saving exit.

Plenty of violence and aggression is caused by violation of the above rules. They seem simple but they're broken on a daily basis. Famous last words: "you don't have the guts".