georgetown u is probably the safest place in dc. remember that you need to lock to something that's as strong as your lock and is securely fixed to the ground, or those expensive locks are a waste. sign posts are not secure, nor is scaffolding, trees etc.
try and get out of georgetown from time to time. it's an awesome city, and georgetown isn't really representative of the rest of it. you'll understand what i mean when you get here. welcome!