Just means that drivers will honk at you more aggresively where the lanes are missing. And give them an excuse to let drivers who run over cyclists get out of jail free whenever you choose not to use the lane(or if there was no lane).
I'd be happier with either 'share the road' signs or lower speed limits.
Plus it is easier to make a DIY share the road sign than it is for you do covertly paint white lines on the road... probably cheaper too.