I figured a candid self-portrait is possible using a computer controlled camera taking pictures at random intervals. One can place it in one's vicinity, and after a while forget it's there. You come back later and choose from the crop. The above is a possible outcome of such a process.
It so happens that one of DPC's most favored image is a candid self-portrait (check out the photographer's note):
Finding other similarities between the two images is left as an exercise to the reader (clue: appeal is not one of them)
So now that I hopefully made you curious, just be aware that it is an open question whether the above image is or isn't a self portrait. Another question is how allowing subjects to select an image to represent themselves affects the candid status of the selected image.
Statistics
Place: 89 out of 91 Avg (all users): 4.0093 Avg (commenters): 8.0000 Avg (participants): 4.3158 Avg (non-participants): 3.8429 Views since voting: 432 Views during voting: 203 Votes: 108 Comments: 7 Favorites: 0