Here the pedestrian-bicycle problems are much more likely to occur on dedicated bike paths than in pedestrian zones (where bicyclists must ride at walking speed). Usually a pedestrian nonchalantly crossing the bike path at an angle without paying the slightest attention to what they're doing.

The same people tend to ignore the bell. They're in their own world. I usually shout at them to move in that case. A friend of mine instead bought a loud horn connected to a can of compressed gas, which commands attention much more easily than a puny little bell. Works on car drivers, too.