Our paths are multi-use and are clearly marked that peds have the right of way.
I'm not 100% certain, but I think that this would be the case even on bike paths although you would be more justified to yell at people to get out of your way.
If there's kids around, I simply slow down to a crawl. Those little buggers are completely unpredictable. Once while passing a little girl riding her bike on the trail, I went by her very quickly and I think it startled her and she fell over. I felt so bad. I don't want to do that again.
Now old, fat guys on bikes are fair game. You can use them like they were traffic cones and weave in and out around them, or simply ride in circles around them as they puff along.
Az