The way I see it, law enforcement ought to be only one of many options for how to deal with something that we want to stop. Many times, people find themselves in a situation in which someone is taking actions which aren't okay, but which also aren't illegal -- or, if they are TECHNICALLY, arguably, illegal, don't feel serious enough to involve the police.

Having other options available increases the range of possible responses. Law enforcement remains an option for things that are worth it, but having other things available gives you a way to deal with things that are still worth addressing, but not worth arresting.