An Anti-Love Drug?

http://www.nytimes.com/2009/01/13/science/13tier.html?em

This isn't really related to our last topic or the topic we've just chosen, but I came across it and thought it was too interesting not to bring up. The researcher mentioned in the article proposes a sort of 'love stimulant' that can make you feel feelings of attachment towards someone. The author takes it a step further and suggests a 'love vaccine' so that you won't fall in love inconveniently.

Are these treatments ethical? Are the feelings one would experience from them 'real'? If not, then what is love?