In theory, yes. In reality, not, not at all. There are the reasons that have been mentioned, but there are many more. First of all, if you have any type of DMX splitting gear in your system, you won't be able to send audio too far. If you use network out of your console to nodes, you will only be able to get your audio signal as far as the nodes. You would need to build some kind of adapter box as the wire inside a DMX cable would not do to well if you just soldered on two connectors. What happens if there is a short in the cable and you cross audio with data? Well, in short, you are hosed.
In other words: BAD IDEA