Re: How secure are
Jay,
The current batch of wireless encryption standards are tested worldwide by people who are as into encryption and security as we are into audio. If that's not good enough, you can probably run your VNC session encrypted, although I doubt that the device-specific apps do this. To be in trouble then, someone would have to be at your show with a laptop, crunch through the packet traffic coming off your network to try and crack it (assuming there is a crack, breaking the encryption itself without an exploit is not practical... your show will have been gone for months or years by then), break in to your network, know what devices you have on it, have the software to control said devices, connect to said device, and then I guess they can move some faders.
Long story short: I wouldn't worry about it even on an unsecured network. Someone would have to want to screw with you, specifically... and if they want to do it that badly they can probably just guess your password, or physically cause a problem.