I mean, these are ment to imply that you have become a hazard and stopping in the middle of the road do be pretty hazardous.

Legitimate reasons to use it imo is If you're gonna be stopped for less then a minute on the side of a road, otherwise find a park, if you need to stop and not somewhere you can park, get as far off the road as you can (ie shoulder of a freeway) or if you actually are in an emergency and need to stop, e.g. you're car is suddenly externally combusting