Perhaps I'm missing something, but do any of you really want to assume that just because no one has walked up and told you your tail lights and stop lights suck that everything is therefore rosy? I'm a firm believer in checking it myself, not waiting for someone to think to tell me my lights suck or don't work at all.
Here's a simple test. Next time you're in a parking lot with a bunch of bikes, have some of the guys with regular lights line their bikes up next to yours and everyone fire them up and let them sit idling. Now walk about 50 to 100 feet back, turn around and look at all the tail lights. Try also walking to either side to check the off-angle visibility. If you do this in daylight, I'm going to guess that at least some of you will notice the same thing I have about those lights. Or maybe not and I'm just a little more screwed up than usual lately. 
Jerry
The FLTRSE3/FLTRXSE/2/FLHXSE/2/3 all have minimal side view of the lights from the rear.
However.. I followed a red hot sunglow (i think) FLHX and this thing was so bright in the sun I couldnt even see the taillights against the bright red metallic paint.
Fortunately I run a TP w/spoiler or backrest with the airwing for daily commute.
Weekend solo cruising it all comes off.
I check each day before I leave the house to assure I have all lighting functional.
Too many idiots here that cant see you when your lights do work.