The statemtent: "Having a funny voicemail message is a good idea, because it shows the employer your sense of humor," is false
When applying for a job you should always show yourself as a professional, skilled, clever and willing candidate. You do not need to show your humorous side when applying for a job. If you show as a humorous person you may seem unprofessional, uneducated and immature, so that the employee won't think you fit for a serious position that requires high level of responsibility.
