We - two males - walked up (and down) mid-day and experienced no issues. In fact, we saw more Ecuadorian police, than residents of the neighbourhood on the climb up. In addition, the day prior an officer had confirmed to us that it is safe to walk up. The residents we did see said nothing. There were a few stray dogs on the way up, but they only barked at cars and never at us/pedestrians. Also, you can more or less take a set of stairs all the way up, only having to be the road for short durations as you cross from one set of stairs to another.