Out here, the paths are so long that the pedestrians are focused in specific areas near the entrances and parking lots. You can easily know when it will be tougher going on a busy day and just plan in advance to have to slow down a LOT and just take it easy.
Pedestrians DO act like chickens on a trail, walking everywhere. But, they are in front of you. The person in front of you has the right of way pretty much no matter what. Just like downhill skiing (as if there is uphill skiing).
The issue is when a multi use trail gets used for commuting. Then the impetus is to get to/from work efficiently, not dodging walkers.
Then, it's the fault of the city.
Take note of Copenhagen if you want it fixed properly. Both design and culture wise.