Wise choice, I even wear mine time to time when I go to "big" events with 100's of people standing around me. No telling what nut is out there and is going to do.
I wear mine 95% of the time I go to the gun range also. I feel its important to wear it while shooting like glasses/ear plugs. I heard it helps in car crashes also? saw it on Seconed chance's website or somewhere like that.
SHTF vs TEOTWAWKI you ask? SHTF, just some crap on the ceiling and walls, TEOTWAWKI end of the world as we know it. Orignally made by 9mm/®™©