That's interesting because everyone I encountered at High Park in regards to the Wood Ducks do not feed them and secondly everyone said it is extremely hard to get good pics as they are very elusive, right now is the exception as there are 18 baby Wood Ducks and they practically walked right over my boot last time I was there but they do not have the amazing colours yet....
really?
again, i may be making a sweeping generalization, since i've only been by the Grenadier pond once.
but some dumbdumbs had bags of bread and, before they even opened them up, the ducks (including 2-3 wood ducks) were by the shoreline.
was also told by a photographer who i met at the Brickworks in April that he loves High Park because the wood ducks are so tame.
bottom line: who cares? as long as you aren't doing anything that would negatively effect the birds (like feeding them bread, IMO) and you can either luck into a tame bird or luck into a great shot, its all good.