So so sooooo sorry.

The calm, reasonable, correct, incontrovertible, non-exaggerated and pretty damn thorough posts never get any attention, do they?

At this moment I can't think of any smartass thing to say, except thanks for cracking me up.

On the terms of it, though, I'd be really wary of increasing the voltage for the reasons you cited, but you also have to beware of succession sucking. This happens when the guy who comes after you to work on the system several years from now sucks because he doesn't measure the power supply voltage (be honest: how often do you measure the voltage of a working power supply?) before disconnecting half of the cameras with 200 foot runs, thus blowing some of the ones that are left.

It would be nice if camera sellers over here knew the voltage limits of their product, but as I said, they don't even understand the question. (And of course this goes for all other products, too.)