TBF they shouldn't really have to be - the way i see it is that a pedestrian should be able to wend his/her merry way on a footpath, shared or no, and it is up to the cyclist to negotiate them.
I work (or at least my mind works) on the basis of the hierarchy of the lesser - Pedestrian > Cyclist > Car driver > Big Thing. In this nominal system, right of way is automatically designated in all situations, regardless of, well, anything really, on the susceptibility of the unit in question. People are small and squishy, Big Things are large and less so. So less so in fact, that they are even a danger to considerably less obviously squishy things like cars - which tbf find themselves to be really quite squishy after all, once they have emerged from an encounter with a Big Thing.
In the spirit of the hierarchy of the lesser, it stands to at least some reason that an encounter between a pedestrian and a cyclist is likely to be worse for the former than the latter. It is therefore encumbent on the latter to ensure against such an adverse encounter.
If this is unacceptable to the cyclist, then the road is always available to them - a choice, it must also be noted, not available to our lesser heirarchical, in conventional wisdom, walking chums.
If you see what i mean.