But when it comes to internet love, I believe it is just an emotional response. Seraphe is right. The internet is simply an electronic means of interaction among many other things. Deception is just as possible online or offline. Call me naive, but I believe that the majority of people mean what they say online.
Anonymity is a double-edged sword.
On the one hand, it encourages the expression of ugly thoughts that might otherwise remain unsaid. Just look at the Culture and Politics venues for many examples. On the other hand, people thus uninhibited will speak their true thoughts instead of the type of subterfuge you might find offline. In this way, you may actually know someone better in a shorter period of time. Love is nothing if only physical, and love is nothing if not physical.