I think that people who give flirting advice should be forced to include a disclaimer like lawyers or stock tippers.
For example:
I am not a playboy. I do not offer personalized dating advice, or comment on the suitability of any individual statement to potential romantic partner. Remember, poor flirting can cause total loss of social credibility and you should always consult with your conscience before flirting or beginning a romantic relationship.
Or the creep.