Depending on the technical means used, it might not be proper to consider it to be hacking in, say, the CFAA sense, but you're still not supposed to do things that have the result of preventing a flight crew from making announcements to passengers. Even if you did those things with an otherwise perfectly legitimate means like playing a sound with a cell phone, playing a sound with a tape recorder, or playing a sound with your voice.

I would be happy to agree that the CFAA is overbroad. But disruptive actions toward flights and aircraft are quite reasonably punishable under other theories, when they could plausibly create a risk for aviation, regardless of the means.