I've read you shouldn't do this with a laptop. I put my MBP flat on a table and at night the room is fairly cold. I have it plugged in with a external HD plugged in too. Am I best taking the battery out? I hardly ever take the laptop with me anywhere right now and when I do I plug it in somewhere. Also, is the adapter safe being plugged in at night? I've seen pictures of them melted etc. I just don't want my mac to set my house on fire basically.