This reinforces the idea that they are in love with love, meaning that they are attracted to the emotions that are often confused with love and not the other person themselves. I do believe that you can make friends on the internet, close friends even, who are there to give you advice and emotional support. 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.