Oh no! What about the deaf *and* blind?!
A probe to poke the target that would spell out in morse code that you're being photographed.
Great, now we've gone from regular cell phones that might be used by a predator to harass their victim unawares, to a case where the cell phone itself is performing the harassment.
Top Ten Things Overheard At The ANSI C Draft Committee Meetings: (7) Well, it's an excellent idea, but it would make the compilers too hard to write.