I carry air horn. Great for dogs and aggressive cyclists. Pedestrians have no obligation to jump into ditch, to clear walking path for speeding cyclists!

In Germany we have rules, and one of those rules is that pedestrians on the sidewalk who are in the cyclepath (usually a too-subtle red stone) do, in fact, have to get out of the way for cyclists.

I imagine there's also a rule about directing airhorns against law abiding cyclists.