Originally Posted by Fruit'n'nut

Fair enough, you were caught out - I didn't say you were a kitten-killer or anything

Rooftops (whether residential or not) and market towns means there's a possibility of vehicles turning off/onto the main road ahead of you, as well as tourists and day-trippers. All this really is a response to the idea that there is "no notice" of probable/possible speed-limit changes, or why it might be a good idea to slow a little - your picture was simply a good illustration of why that isn't really the case.