I read this in F1 official site:
http://www.formula1.com/news/features/2011/3/11826.html
"The idea behind the rear wing is that in certain parts of the circuit a following driver will get a signal that he can momentarily activate the control that opens the gap between the upper and lower wing planes, in order to boost straight-line speed by reducing drag. The driver of the car in front cannot do that, thus conferring a temporary advantage on the follower. The exact location and length of the ‘wing zones’ will be decided by the FIA, who are committed to making the technology work."
Heh, I just read this reasoning and I'm facepalming hard core. Sorry if it's discussed elsewhere, I'm too flabbergasted right now. It's not only unfair, but needlessly complicated.