I don't care so much about people walking on the street as I do people walking in the bike lane. And on campus here, there are designated bike paths, with very noticeable signage on them, yet people still walk on them, when there is a sidewalk adjacent to it. Completely blows my mind.
Check out my man in the red. See the no pedestrian signage right ON the path?
Now look where the pedestrian path is, with the woman walking on that correctly.
Every couple of hundred feet this is visible. The bike path is even a different color. Doesn't seem to matter though.