I wouldn't go as far as saying "no worries", while violent crime isn't as bad at Disney, it has happened. What about the murder at the House of Blues & I do beleive that there was a rape in the parking lot down at that end of DTD a few years back as well. I know there was the murder at the Checkers on Irlo Bronson Highway last year & that is just 5 minutes from World Drive entrance to the parks. I think you were living here when that happened. I am not sure if you were down here yet when the ones at DTD occured though.
Forgot to mention that there was a child molester that was hitting on International drive. While that may not be Disney, it is close to Universal. Irlo Bronson Hwy & I-Drive are hot tourist spots...