ML team warnes using their software as this is a usual practice. I'm a big fan of Magic Lantern and if you want to be the one as well, you should accept it's limitations, no warranty and no responsibility for it's use. Current version is stable although it can hang on anyway. You are warned, that in the case the camera stops to respond, you should remove the battery immadietaly. This is the only case I see, that something wrong could happen if it's in LV mode - sensor may be active, may heat up but nothing would prevent it from overhitting. I haven't broken my camera, neither have heard, that anybody did although s..t happens.
Maybe this add on software is simply just not for you?