As far as transportation goes, many of us already purchase plastic cases that are opaque in nature, usually intended for traditional firearms. Transporting them in those allows for a lock to be attached, so the case can't be opened quickly. We use those if we're transporting them on aircraft to go to international events or crossing the border.
We feel that would be a good way of ensuring that the devices are not accidentally seen or waved around in public, causing unnecessary scares, as it were, and escalating a situation beyond what's immediately required.
Forgive me. I forgot the second half of your question.