In strict legal terms, harassment is any unwelcome conduct that is based on gender, religion, national origin, race, color, disability, and age. Also, the conduct should be severe that any reasonable person will feel threatened and intimated. This means that isolated cases and petty nuisance are not yet considered as harassment.
A tennis ace once said that if you serve better, your chances of winning increase. Same goes for customer relationship management. Some human resource (HR) people are of the view that at times one has to use emotions to win customers. And to some extent that also holds true! Though emotions stand first, knowledge holds the second badge.
your product may do exactly what you promise but those that are new to the game and are accustomed to making a $150 a day from their day job are just not going to believe it. Advising or reminding your customers that even if they only achieve a fraction of the results your currently getting, they will still be able to quit their day jobs and start living the lifestyle they have always wanted.