I think the threat is more on still cameras than on audio.
It would be impossible and stupid to ban audio recordings. A big mistake, but we know it's no problem for them to make such a mistake (again).
They banned video recording because they are getting disturbed.
What would be the problem with audio ? lights ? screen ? tripod ? red light ? They can pretend whatever they want in their recording policy, most tapers are discrete and don't disturb anyone.
Obviously, some tapers would think it's a provocation and I wonder if the management would get the expected results.

It could even encourage video taping. We have very few 2008 video recordings because there was very few tapers.
Most tapers did audio only because it was allowed. But if all recordings get banned, audio or video taping is the same problem and potential video tapers will be back. Com'on let's ban everything.
This is just a theory. I can't get into people's mind. I can imagine what I would love to do, though it's very unlikely.

Not my style to break the rules.

Not at all.