Are you guys discussing the legal definition of rape or are these just opinions about what you personally consider rape? Here is the legal definition in California:
http://codes.findlaw.com/ca/penal-code/pen-sect-261.html
Summary:
1. Physical force or threat of physical force/bodily injury
2. If the person is incapable of consent due to a mental disorder or disability which was known to the accused.
3. Intoxication to the point of being incapable of consent
4. Person is unconscious, asleep, or otherwise incapable of knowing what is happening
5. Threat to use the power of office to arrest, incarcerate or deport the person. This would apply to law enforcement and government officials, and is probably aimed at bad cops who coerce women for sex based on threats of arrest
6. Deception, but only in the manner of convincing the person that you are someone else, like climbing into a woman's bed and having sex with her while she thinks you're her husband but you aren't
No, it isn't rape if you go out on a date and lie about your age, then have sex with her, and she later says she would never have climbed into bed with you had she known your true age. After some point, the law is based on the assumption that an adult is responsible for a conscious decision to have sex with someone, and leaves it to them to ferret out deceptions. We don't have to believe whatever someone tells us on a date, and we certainly don't have to have sex with them.
Sexual blackmail also doesn't qualify other than in the narrow circumstance involving law enforcement. If you threaten to fire an employee if they don't have sex with you, that is civilly actionable as sexual harassment, but it isn't a crime. Similarly, it isn't a rape to threaten to expose someone to social embarrassment if they don't have sex with you. Only threats of physical force qualify.