The thing to remember about running anything on the internet, a lot of people have opinions that differ from yours, and some of them find satisfaction in giving either rude, dumb or biased opinions.
Rather than taking offense, learn to take a step back and chill. The primary rule about people like these: under no circumstances do you give additional fodder.
Having said that, it’s tough. The urge to either give a sarcastic comeback or indulge in a flame war is overpowering at times. Times like these make me appreciate the toughness one needs to survive the hard knocks public opinion dishes.