From an umpires point of view, these games are terrible as well.
Selfishly, I like it when the team that is ahead starts walking off bases, etc. to get the outs and get the game over.
However, I have seen situations where the losing coach got upset at that strategy, saying something like...."we don't need your help, let us play!" Fortunately, the situation did not escalate into anything uglier than that.
What I usually see is that a team will keep going until the run rule limit is reached, then ease up. I have seen teams ease up too early then find themselves in a ball game a few innings later.
I guess there is no one-size-fits-all answer, each situation is unique....