I've started to since the beginning of last winter
reason being my towns so busy, people, traffic, buses, cyclists everywhere even on most of my domestic round.
Its mostly a waste of time though, even with a cone out and a hi viz, I still get people constantly almost walking straight ino me whilst texting etc.
my main gripe though is I often keep the pavement clear and stand off the kerb to clean 1st and 2nd floors and give people room to walk past in front of me where I can see them. Lost count of the number of near misses I've had where someones snuck past behind me within inches and nearly smacked em one in the face with either the end of the pole or an elbow ! :

simon