noob at StackExchange myself
I'm a noob to StackExchange myself - several departments including StackOverflow. With a "reputation" of a couple dozen, I don't have a problem to sustain steep criticism from someone with a reputation of a couple dozen thousand. My approach is to thank him for his criticism and for his good work, perhaps clean up my own mess if cleanup is due, do my homework, and generally stick to the original topic. I don't recall any outright personal attacks at the SE sites.