I strongly recommend that we change ubiquity, regardless of what the desktop maintainers do. Even if all in-archive flavours change their configuration (which they may or may not want to do), we don't want to end up accumulating support debt from derivatives who don't realise that they need to do this to make the installer work. ubiquity already has plenty of different ways in which it attempts to disable automounting; one more won't hurt.
I strongly recommend that we change ubiquity, regardless of what the desktop maintainers do. Even if all in-archive flavours change their configuration (which they may or may not want to do), we don't want to end up accumulating support debt from derivatives who don't realise that they need to do this to make the installer work. ubiquity already has plenty of different ways in which it attempts to disable automounting; one more won't hurt.