Dude, if someone wants into a garage, they are not going to take the time to fish a coat hanger over the door. I am sure the OP will take care of making sure their garage is secure, so you really do not have to worry.
As for clearing it up for me, what do you want to clear up?
__________________ Ren: Now listen, Cadet. I've got a job for you. See this button? Ren: Don't touch it! It's the History Eraser button, you fool! Stimpy: So what'll happen? Ren: That's just it. We don't know. Maybe something bad, maybe something good. I guess we'll never know, 'cause you're going to guard it. You won't touch it, will you?
As you indicated, my two doors are disabled from the inside. As the garage stands now, and I use the word "stands" loosely, someone would have to break in. I suppose I might get sued because of their injuries, but I won't worry about that know.
Mikegp, I do understand what you are talking about, I think. But, a simple key would be less hassle. I would have to go find a coat hanger, then a ladder, etc...