Why don't people rock the boat in early on-line dating encounters?

Marginal Revolution: Why don't people rock the boat in early on-line dating encounters?: "First,�email is a bad medium for making and negotiating outrageous claims.� You can't communicate subtleties of tone and teasing and you can't easily do 'repair work' if you offend�the audience, even assuming you can notice the offense or keep the dialog going after an offense.�"