It all helps, but a very good friend was sitting on her bike behind a stopped school bud with all of it's lights flashing and was rear ended by a woman who said" I didn't see her". My friend had strobe brake lights and an added brake light bar on her bike. Sometime you're just invisible.
I've also been rear ended at an intersection before. Totaled my old and beloved VTX 1800. Because of clean living I'm sure, no injuries. My solution is I no longer stop.