The existence of "cheat books" (third-party guides or in-game items sold for coins) doesn't make cheating acceptable in Club Penguin. The game was built on fair play, social interaction, and earned progression. Here's why bypassing that matters:
Club Penguin's loop: play mini-games → earn coins → buy igloo items/clothes → show off. Cheats (auto-players, coin generators, item injectors) break this economy, devaluing the effort of legitimate players.
Disney/Club Penguin team designed challenges to be achievable and safe for kids. Cheats often come from shady sites that phish credentials or distribute malware. Account bans were frequent and permanent.
Even in a virtual world, "everyone does it" doesn't justify unfairness. The satisfaction of earning a rare item (like the Viking Helmet or Golden Puffle) comes from the journey.
Club Penguin Rewritten and other private servers eventually shut down partly due to cheat-related instability. Fair play kept the original alive for 11 years.