As you may know that someone could be secretly watching you or your child with your webcam right now? Is it worth taking such a risk? camDown can help stop them!
Nope. Good voting security means you cannot have any way of proving how you voted.
Hyperbolic but illustrative example
Prior to an election someone kidnaps your family and threatens to kill them unless you vote for candidate X.
There should be no way of verifying if you actually went along with it, they just have to take you at your word.
Obviously, that's a ridiculous situation, but it's a simple example, and there are more subtle schemes that would work better, but still rely on that same underlying mechanism.
This is the reason taking photographs of your ballot is forbidden, and why any ballot with something that might be an identifying mark, like a signature, is thrown out.
Let's keep in mind that camDown is your security solution to protect you and your business from peeping toms and I feel your smart friends would say the same!