Yes, you probably should stop as using them while driving usually means “something is wrong with my car and I’m probably going slower than normal, go around me if possible”. On some highways it is law to use your hazards if you have to go a certain speed under the current limit (on the NYS Thruway it’s law to use them if you can only go 45 mph I believe). Another use of course is when you are pulled off to the side of the road in an awkward spot to let people know you’re there and you’re pulled over.