Yah, these are maybe the only cyclist group that will really make my blood boil. I seem to mostly find them moving uphill, they seem to think that because they are moving slowly it doesn't really matter which side they are on. But if I'm coming fast down a hill, using my designated space between cars on one side and the sidewalk on the other side, I have just nowhere to go if one of these dorks turn up. Plus they're totally unpredictable. Which side does a salmon swerve to?

Maybe they're the same people who use the bike lanes to park their cars in, "just for a moment cause I have to pick up something".