Because it's ditzie.
Because ditzes are wondering if his followers will exceed Lady Gaga's. Seriously.
Because people are outraged that he gets mean, viscious tweets. Really? Oh the humanity! So? He's on Twitter you ditz! Did he just fall off the turnip truck? What do you expect? A pope on Twitter.
Because he is setting a bad example for priests - it's like hanging out at a dive bar and drinking and smoking with the riff-raff.