What an honor and surprise to receive your response here; the very first!
Rodents are a legitimate concern, Suzanne. I've experienced the problem. By promoting composting in Lake Worth, we certainly don't want to increase health concern.
Luckily, there are several compost bin designs which are rodent-proof. Several bins on the market are rodent resistant, but that's not quite the same. Palm Beach County Solid Waste Authority has distributed several thousand rodent resistant compost bins called Earth Machines. I've used them for years and once had a rat problem. What I need to do with the SWA bin is wrap wire mesh underneath.
http://www.earthmachine.com/If a team of compost experts helped educate city residents about this issue and we provide rodent-proof bins as well as build-your-own designs, then we'd reduce chances of rodents considerably. This would also help raise awareness leading to homes and businesses sealed more tightly against rodents . . . really the best solution.
Cya 'round town!