I agree with the "almost always" part. The OP probably does too. I have wandered around several times trying to find a Supercharger at night. Some locations do need better support in mapping and photos.
They are on one of the maps. However, they do not always give enough detail to actually find the Superchargers. This debate is about those few locations that are in covered areas, behind buildings or even inaccurately described. Even some with actual photos can end out being misleading. Edison, NJ is an example. There is a photo of the Superchargers with a Macy's in the background, but the Macy's in question is actually not now visible from the Superchargers, so one can wander a bit. It is only a small minority of cases, but at night, in inclement weather, some of them are a distinct challenge.
While I agree with others that zooming in on the map shows it really well, yes there is a guide. This is a mostly comprehensive guide that users have been keeping updated. If one is not listed, and you go to it, please put in some comments on it, so some detail can be added.
This one is rediculous. Two days after getting the X we had to find it at about 3am. Finally found it with a couple miles left on the battery. No restrooms after close but the security folks are nice and will let you use their office if you can find them.
I have to disagree with this, the SpC there is a few hundred feet from that macys and isn't all that hard to find. some of the hardest SpCs to locate are those in parking structures like at savannah, colorado springs, atlanta, bethesda and others. those interior ones cannot be located using the maps.
During the day, with clear weather, I agree. I was looking at night with rain, and I had never before been to Edison. Most of our examples are no more than a trifling inconvenience unless night and/or bad weather intervene. That said I have helped several people find Savannah myself, and even with instructions it's not automatic to find it. Beyond questions the interior ones are often bewildering even without night or weather issues.
Lately Plugshare has resolved a few such issues for me. My first time in Savannah the airport information staff talked me through it.
It doesn't help to someone locate where the station is. If the Plugshare pics are doing a poor job of that at a location your using. Take better ones and upload them. 
That was a fun night, it wasn't like stalking at ALL. It was exactly like stalking
