The only people hurt by the initial overvaluation were the people that bought high. Everybody else wins or is neutral. Everybody. Again, unless the market starts caring about retribution and undervalues them. Otherwise everybody gets exactly what the market will give them.
The ibanks, Zuckerburg, and initial investors that sold on IPO day or shortly after, all win by a huge margin. They pulled the wool over lots of people's eyes; perhaps not intentionally, perhaps they honestly believed their own bullshit, but in any case their irrational exuberance hurt them not one bit.