What common mistake do developers make with Model events, why does the mistake cause problems, and what is the safer approach?

What common mistake do developers make with Model events, why does the mistake cause problems, and what is the safer approach? One recurring problem with model events is applying it without understanding the boundary it protects. Treating an Eloquent model as if it were just a database row while ignoring relationship, casting, validation and authorization boundaries. In addition, Eloquent exposes lifecycle events that can run logic when models are created, updated, saved, deleted and other lifecycle stages. Safer engineering approach: keep the responsibility in the correct layer, use the framework's supported API, validate and authorize inputs, avoid hidden side effects, and verify the behavior with tests.