Magic lantern drains my batteries when the camera is off
Ugh?! How's that? If anything it's gps that drains battery on t he 6d, otherwise it's a bug and you should post it on the ml forum...No, it's easily reversible so I doubt it could do permanent damage.
Wrong - the alpha of ml on the 5d3 is not reversible right now, you cannot remove the boot flag yet (like on all other supported camera models). So if you want the option to remove ml w/o trace, don't use the 5d3 build yet...
... but as Canon never bothered anyone about the bootflag you should try ml anyway, it's beyond awesome :-)one of the CR Commandments is I am your Canon, thou shall have no other firmware before Me,
Actually we should thank Canon for allowing ml to use their internal devlopment hook to boot the ml firmware on the card - Panasonic recently disabled any 3rd party fw: http://www.eoshd.com/content/518/why-panasonic-want-to-block-hacked-firmware
Part of me wonders if Canon marketing understands that it is a good thing or whether they hate it and have been going to engineering and asking them to lock it out and engineering is just going "que? que?" and putting uncomprehending looks on their faces and walking away because they are PO at how marketing has had them cripple so much of the awesome hardware they made. Or something. Probably not, since I'm sure business types would never let an engineer get away with that, they probably have them locked in a dungeon, but who knows hah.