In designing the set, Mark Rosewater, in the article "Outlaws of the Land, Part 1," noted this: "Defining 'commit a crime' as a type of action, something many Magic cards do, rather than as a specific new mechanic, allowed us to define the term in a way that made many existing cards part of the theme." This means that we can use cards that have existed since Alpha when looking at Crime, and focus on cards that care about Crimes being committed
This puts them in a lose-lose situation: pay an extra mana tax on all noncreature spells or let you draw free cards
And it can access your Blue-Eyes monsters from your Deck by sending them directly to your Graveyard, for easy revival
Trading Card Game, as well as rules text that explicitly prohibits using them in Duels, they're illegal for tournament play and may be treated as banned cards
Characters who encounter monsters have the option to sneak past them or fight them