You can certainly lower your battery warnings, however you had better keep your eye on the battery level and use good judgement to bring it back before it drops out of the sky. This means, Oh, let me get that last shot in while I am out there!
On the coptertube guy, I give him kudos for flying out in the winds out into the sea. Having said that, his infringement on those ships and privacy of their customers will most likely ban anyone from filming moving vessels. I personally don't mind a quad flying and taking pics. At the end of the day, my iPhone has gathered enough data for the CIA to know what time I took a piss during the day... We are all under surveillance.