The question has been asked - what would you tweet from the back of a police car.
Ironically enough - I think it depends on what you are doing in the back of a police car.
For instance - if you have just successfully heisted a hundred million dollars in art - you probably want to tweet something like -"I've been framed!"
If you just got caught with four hundred cheesburgers and a plume os strange smelling smoke wafting from your car ala Snoop Dog or Cheech and Chong, tweeting - "What? I was a little hungry," probably isn't going to cover it.
Also if arrested by an attractive officer, tweeting: "cop is smoking hot - I hope she's really a stripper" is probably isn't going to get the charges reduced.
And finally its never wise to tweet about "being hassled by the man - the man just trying to keep a good tweeter down."
It just doesnt sound right.