It felt very much like hanging out with your friends, having a few drinks, and pondering big, crazy, or weird scenarios. Imagine your friend saying, "As your friend, I cannot provide you with this information." and completely ruining the night. That's not going to happen. Even my kids would ask me questions when they were younger: "Dad, how would you destroy earth?" It would be of no use to anybody to deny answering that question. And answering them does not mean they will ever attempt anything like that. There's a reason Randall Munroe's "What If?" blog became so popular.
Sure, there are dangers, as others are pointing out in this thread. But I'd rather see disclaimers ("this may be wrong information" or "do not attempt") than my own computer (or the services I pay for) straight out refusing my request.