Some sort of audible warning on guns to stop drive-bys maybe?

Lets ban something too, while we're at it.

If people are willing to ignore existing laws, what the heck makes them think they'll abide by this one?

And if I was a dirty pervert, a phone camera is the last thing I'd pick to take my ill-gotten images. There'es tonnes better choices from tiny wireless spy cameras to proper point and shoot cameras that are as small as a phone anyway (but higher quality images).

Why wouldn't the perv just use a small digital camera without audio rather than a cell phone with?