text: i'd say, depends.  if a road is the definition of a boundary, then go for it.  if a road gets rebuild or doublificated, then ... i think i'll have another beer.  i see to the north of here the boundary looks to have gone south, or something.  are you asking for a revert?  i'd say yeesh, what a mess, but here i see too many (residential) landuses tied to ways that you are probably encountering old-school mapping, for lack of a better term, where different features share nodes, in contrast to each independent feature mapped separately.
  
  where am i here?  oh, nevada.  no prejudices here about california mapping techniques.
  
  should i bother to comment, or should i let my demented ramblings here ferment and turn into some foaming rancid putrified meaningless rubbish that will further pollute the hallowed osm notes?  yeah, why not.  time to mash the comment button.