AC is very safe - just don't get drunk and killyourself diving headfirst off a pier into shallow water. Very.
For that matter about 3,000 tourists at a time wander the streets of Belize city (daytime)without incident - nights in BC are dicey if you are uninformed, but BC is really interesting and a day there is kind of cool ----- a must-see is the Belize City Museum. Photographers will go nuts at the wonderful old colonial architecture - get a good cab-driver as a guide and poke around the city, it's rich and diverse.