In response to Hot Water’s comment regarding locomotives being locked: I can’t speak for every railroad, but with NS, we lock them up in these circumstances...
1. It’s a train tied down somewhere on the mainline.
2. Yard engines in not so friendly areas (we have quite a few of those areas here in Atlanta).
3. This one is a little off topic, but DPs (mid train and end of train) are to be locked up so no one can get inside and mess with anything.
All of our yard engines (standard cabs and the SD60s) have the equivalent to a pad lock. Wit’s the wide bodies, we lock the back door from the inside then the front has a lock that slides in front of the door that basically just keeps you from opening it.
And just like you said, if they were to break into a window on the side they would definitely need a ladder lol. Even then the glass isn’t going to be easy to break.
