Well, yeah, and that's no good, but the bigger danger in wrong way riding is that turning traffic won't look for you because you're not where anything should be.
TCS
Very true, though in this case the guy's not crossing any intersections (unless my mapreading skills have deteriorated).
I'm a big 'DONT RIDE ON THE SIDEWALK!!!' kind of guy, but cases like this even I have no problem with as long as you keep the bike at coasting speed.