O'brien may have a tasty name, but don't be fooled; O'brien is one passive-aggressive kitty. Though he looks like a model kitty, without deviating from his pose; give him the wrong look and he'll 'accidentally' knock over your piping-hot cup of joe.
Why O'brien loves boxes is beyond us. But use a simple box & place it next to your area. It'll give O'brien control & you some space. Make sure the flaps are tucked in for safety!