It's obvious day today as Facebook (FB) has its price target cut to $23 from $35 at BAML, which cites future lockup concerns. The next big day expiration day is November 14. Shares +1.2% premarket. Take that Merrill Lynch. Far more ominous for Facebook: "Many are tired of (it)," says Jim Cramer. "When you drop off kids to school, you learn they like Twitter a heck of a lot more than Facebook."