Ted doesn't take much damage from John in a fist fight, but later gets "killed" due to cuts and tears. This is true for real stuffed animals. Because they have a spongy consistency and lack brittle parts, impacts do not harm them, but they can be torn apart fairly easily.
In the fight scene with John Ted is shown to be a much better fighter than him, this makes sense. Ted will have had to become a strong fighter because he and John would of been bullied relentlessly because of Ted being a living teddy bear.
In the trailers for Legalize Ted, Ted jokes that their lawyer, Samantha L. Jackson, has a name very similar to Samuel L. Jackson, and then says "You seen every movie ever? He's the black guy." The trailer later shows a court scene where the judge is a black man (I don't know that actor), and later another scene with Morgan Freeman. No Samuel L. Jackson in sight; this becomes a great bit of meta comedy since Ted is proven wrong in his claim... By the trailer to his own movie, at least.
In the "Where Are They Now?" Epilogue, it's stated that Donny was arrested for kidnapping Ted, but the charges were dropped "when everyone realized how stupid that sounded." This is played for comedy, but it also implies that despite 27 years of Ted's existence, he's never been given legal rights. Taken further, it means that unless these steps are taken, others will be just as able to attempt to kidnap Ted without fear of repercussion.
How about that because of this, a man who very nearly committed vehicular manslaughter over a freaking teddy bear is back on the streets, and remains the caretaker of an already-damaged child who may or may not even be his son? I mean, hell, he didn't act like Ted was his first kidnapping victim.
Actually, that may have been his son that he had probably kidnapped from a wife or girlfriend that may have had custody of him.
Though they probably chose not to due to fear of being made laughing stocks of being the person who kidnapped a stuffed toy, which is probably Donny's fate.
This now falls under Ascended Fridge Horror since Ted's civil rights and Donny being a free man are plot points in the sequel.
John tells Rex that he hopes Rex gets Lou Gehrig's Disease. In the "Where Are They Now?" Epilogue, we find out that Rex did, in fact, contract Lou Gehrig's Disease. Since the entire movie is based on the idea that John brought Ted to life through the power of a wish, does this mean that John possibly gave Rex Lou Gehrig's Disease with another wish?
No, Ted was brought to life when John made a wish on a star, and the ending implies that you only get one. An idle everyday hate wish wouldnt do anything, its just a comedic coincidence.