Earlier quoted context omitted.
That's not really the other way around. That's 2 ways of stating basically the same thing.
I'll have to disagree... the goal is to stop encouragement , rather than to start discouragement - stopping acceleration is not the same as starting deceleration.
What is 0 encouragement/discouragement? It's not obviously easy to define. One definition is doing nothing = 0 encouragement and 0 discouragement. By that definition, not removing graffiti (aka doing nothing) is not encouragement, it's simply doing nothing: a lack of encouragement and a lack of discouragement.
Because we haven't agreed on a definition of 0 encouragement and 0 discouragement, saying "decreasing encouragement" and "increasing discouragement" mean basically the same thing.