> Discussing/brainstorming this in a public forum is volunteering your brainpower in support of murderers.

If you think that you in a few moments on the back of a napkin will come up with something that someone funded and fuelled by an ideology that they are willing to die for can't with months of planning, then that's arrogance of an epic scale. This is as ridiculous as don't talk about hacking/spoofing/phishing because otherwise the bad guys won't figure it out.