Ah. So the issue is catching stray sunlight through one of the lenses and having it focus onto / burn the display? If that's avoided, are there other issues to worry about?
Some users have reported that the tracking cameras have gotten white dots in them from sun exposure, but the units that I've seen generally have a few dots in the periphery straight from the factory, so I think they're just not noticing until after. You rarely use the passthrough view, anyway, so it isn't a huge deal, generally.
Other than that, I can't really think of anything off the top of my head. I know someone who uses one on a trampoline in the heat of the summer to cheat in a video game; Q2s are surprisingly durable little things.
