Can you project the {copyrighted flying rodent} signal?

We'd make a fortune if we could! There's a pesky physics problem here, and it's caused by the fact that our beams of light scatter off of water droplets in the air, including clouds, allowing them to be visible. In order to project any shape, we need to have a known focal distance from the source (our lights) to the object. In the case of clouds, there's no obvious boundary as the moisture levels increase as you move closer to and into the cloud structure. Because of this, if we projected your favorite symbol into the sky the result would be nearly the same as what you get with the columnar beam only with some fuzzy effects that don't look quite like anything at all. Your favorite superhero would be confused, and that's bad for everyone, so the mobile phone is probably the best way to request immediate assistance when some joker or two-faced guy is causing issues in the city.